15960439057 has 4 divisors (see below), whose sum is σ = 16115394880. Its totient is φ = 15805483236.

The previous prime is 15960439051. The next prime is 15960439087. The reversal of 15960439057 is 75093406951.

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 not a de Polignac number, because 15960439057 - 2¹⁹ = 15959914769 is a prime.

It is a super-2 number, since 2×15960439057² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15960439057.

It is not an unprimeable number, because it can be changed into a prime (15960439051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77477757 + ... + 77477962.

It is an arithmetic number, because the mean of its divisors is an integer number (4028848720).

Almost surely, 2^15960439057 is an apocalyptic number.

It is an amenable number.

15960439057 is a deficient number, since it is larger than the sum of its proper divisors (154955823).

15960439057 is a wasteful number, since it uses less digits than its factorization.

15960439057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154955822.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 15960439057 in words is "fifteen billion, nine hundred sixty million, four hundred thirty-nine thousand, fifty-seven".