15721651532 has 12 divisors (see below), whose sum is σ = 27513989160. Its totient is φ = 7860511776.

The previous prime is 15721651531. The next prime is 15721651553. The reversal of 15721651532 is 23515612751.

15721651532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (15721651531) 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, 62168 + ... + 187904.

It is an arithmetic number, because the mean of its divisors is an integer number (2292832430).

Almost surely, 2^15721651532 is an apocalyptic number.

It is an amenable number.

15721651532 is a deficient number, since it is larger than the sum of its proper divisors (11792337628).

15721651532 is a wasteful number, since it uses less digits than its factorization.

15721651532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157000 (or 156998 counting only the distinct ones).

The product of its digits is 63000, while the sum is 38.

The spelling of 15721651532 in words is "fifteen billion, seven hundred twenty-one million, six hundred fifty-one thousand, five hundred thirty-two".