77609279913 has 16 divisors (see below), whose sum is σ = 113176440000. Its totient is φ = 46915004480.

The previous prime is 77609279899. The next prime is 77609279921. The reversal of 77609279913 is 31997290677.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77609279913 - 2²² = 77605085609 is a prime.

It is a super-2 number, since 2×77609279913² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (77609279953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3010038 + ... + 3035711.

It is an arithmetic number, because the mean of its divisors is an integer number (7073527500).

Almost surely, 2^77609279913 is an apocalyptic number.

It is an amenable number.

77609279913 is a deficient number, since it is larger than the sum of its proper divisors (35567160087).

77609279913 is a wasteful number, since it uses less digits than its factorization.

77609279913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046152.

The product of its (nonzero) digits is 9001692, while the sum is 60.

The spelling of 77609279913 in words is "seventy-seven billion, six hundred nine million, two hundred seventy-nine thousand, nine hundred thirteen".