79111612778 has 16 divisors (see below), whose sum is σ = 129626404704. Its totient is φ = 35912313360.

The previous prime is 79111612747. The next prime is 79111612799. The reversal of 79111612778 is 87721611197.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358500 + ... + 2391807.

It is an arithmetic number, because the mean of its divisors is an integer number (8101650294).

Almost surely, 2^79111612778 is an apocalyptic number.

79111612778 is a deficient number, since it is larger than the sum of its proper divisors (50514791926).

79111612778 is a wasteful number, since it uses less digits than its factorization.

79111612778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751077.

The product of its digits is 296352, while the sum is 50.

The spelling of 79111612778 in words is "seventy-nine billion, one hundred eleven million, six hundred twelve thousand, seven hundred seventy-eight".