77918657914 has 16 divisors (see below), whose sum is σ = 120656424960. Its totient is φ = 37700020080.

The previous prime is 77918657903. The next prime is 77918657987. The reversal of 77918657914 is 41975681977.

It is a super-2 number, since 2×77918657914² (a number of 23 digits) contains 22 as substring.

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, 1143207 + ... + 1209445.

It is an arithmetic number, because the mean of its divisors is an integer number (7541026560).

Almost surely, 2^77918657914 is an apocalyptic number.

77918657914 is a deficient number, since it is larger than the sum of its proper divisors (42737767046).

77918657914 is a wasteful number, since it uses less digits than its factorization.

77918657914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85245.

The product of its digits is 26671680, while the sum is 64.

The spelling of 77918657914 in words is "seventy-seven billion, nine hundred eighteen million, six hundred fifty-seven thousand, nine hundred fourteen".