15731681476 has 135 divisors (see below), whose sum is σ = 35159805387. Its totient is φ = 6140856960.

The previous prime is 15731681461. The next prime is 15731681513. The reversal of 15731681476 is 67418613751.

The square root of 15731681476 is 125426.

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

15731681476 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4882375876 + 10849305600 = 69874^2 + 104160^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

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 44 ways as a sum of consecutive naturals, for example, 507473581 + ... + 507473611.

Almost surely, 2^15731681476 is an apocalyptic number.

15731681476 is the 125426-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15731681476

15731681476 is an abundant number, since it is smaller than the sum of its proper divisors (19428123911).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15731681476 is an frugal number, since it uses more digits than its factorization.

15731681476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 57 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

Multiplying 15731681476 by its sum of digits (49), we get a square (770852392324 = 877982²).

15731681476 divided by its sum of digits (49) gives a square (321054724 = 17918²).

The spelling of 15731681476 in words is "fifteen billion, seven hundred thirty-one million, six hundred eighty-one thousand, four hundred seventy-six".