15977873893 has 4 divisors (see below), whose sum is σ = 16099842528. Its totient is φ = 15855905260.

The previous prime is 15977873869. The next prime is 15977873911. The reversal of 15977873893 is 39837877951.

15977873893 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15977873893 is a prime.

It is a super-2 number, since 2×15977873893² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15977873693) 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 3 ways as a sum of consecutive naturals, for example, 60984121 + ... + 60984382.

It is an arithmetic number, because the mean of its divisors is an integer number (4024960632).

Almost surely, 2^15977873893 is an apocalyptic number.

It is an amenable number.

15977873893 is a deficient number, since it is larger than the sum of its proper divisors (121968635).

15977873893 is a wasteful number, since it uses less digits than its factorization.

15977873893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121968634.

The product of its digits is 80015040, while the sum is 67.

The spelling of 15977873893 in words is "fifteen billion, nine hundred seventy-seven million, eight hundred seventy-three thousand, eight hundred ninety-three".