15597761879 has 12 divisors (see below), whose sum is σ = 18729638208. Its totient is φ = 12938234400.

The previous prime is 15597761863. The next prime is 15597761899. The reversal of 15597761879 is 97816779551.

It is not a de Polignac number, because 15597761879 - 2⁴ = 15597761863 is a prime.

It is a super-2 number, since 2×15597761879² (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 (15597761849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5132702 + ... + 5135739.

It is an arithmetic number, because the mean of its divisors is an integer number (1560803184).

Almost surely, 2^15597761879 is an apocalyptic number.

15597761879 is a deficient number, since it is larger than the sum of its proper divisors (3131876329).

15597761879 is a wasteful number, since it uses less digits than its factorization.

15597761879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10268486 (or 10268479 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 65.

The spelling of 15597761879 in words is "fifteen billion, five hundred ninety-seven million, seven hundred sixty-one thousand, eight hundred seventy-nine".