15823375681 has 3 divisors (see below), whose sum is σ = 15823501473. Its totient is φ = 15823249890.

The previous prime is 15823375679. The next prime is 15823375691. The reversal of 15823375681 is 18657332851.

The square root of 15823375681 is 125791.

It is a perfect power (a square), and thus also a powerful number.

15823375681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18657332851 = 149 ⋅125216999.

It is not a de Polignac number, because 15823375681 - 2¹ = 15823375679 is a prime.

It is a super-2 number, since 2×15823375681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15823375691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 62896 + ... + 188686.

It is an arithmetic number, because the mean of its divisors is an integer number (5274500491).

Almost surely, 2^15823375681 is an apocalyptic number.

15823375681 is the 125791-st square number.

15823375681 is the 62896-th centered octagonal number.

It is an amenable number.

15823375681 is a deficient number, since it is larger than the sum of its proper divisors (125792).

15823375681 is an frugal number, since it uses more digits than its factorization.

15823375681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251582 (or 125791 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

Multiplying 15823375681 by its sum of digits (49), we get a square (775345408369 = 880537²).

The spelling of 15823375681 in words is "fifteen billion, eight hundred twenty-three million, three hundred seventy-five thousand, six hundred eighty-one".