15729681015772 has 6 divisors (see below), whose sum is σ = 27526941777608. Its totient is φ = 7864840507884.

The previous prime is 15729681015757. The next prime is 15729681015791. The reversal of 15729681015772 is 27751018692751.

15729681015772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15729681015772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1966210126968 + ... + 1966210126975.

Almost surely, 2^{15729681015772} is an apocalyptic number.

It is an amenable number.

15729681015772 is a deficient number, since it is larger than the sum of its proper divisors (11797260761836).

15729681015772 is a wasteful number, since it uses less digits than its factorization.

15729681015772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932420253947 (or 3932420253945 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 61.

The spelling of 15729681015772 in words is "fifteen trillion, seven hundred twenty-nine billion, six hundred eighty-one million, fifteen thousand, seven hundred seventy-two".