77777693016 has 64 divisors (see below), whose sum is σ = 195233418720. Its totient is φ = 25820820480.

The previous prime is 77777693011. The next prime is 77777693017. The reversal of 77777693016 is 61039677777.

It is a super-2 number, since 2×77777693016² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77777693011) 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, 10310206 + ... + 10317746.

Almost surely, 2^77777693016 is an apocalyptic number.

It is an amenable number.

77777693016 is an abundant number, since it is smaller than the sum of its proper divisors (117455725704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77777693016 is a wasteful number, since it uses less digits than its factorization.

77777693016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236 (or 9232 counting only the distinct ones).

The product of its (nonzero) digits is 16336404, while the sum is 60.

The spelling of 77777693016 in words is "seventy-seven billion, seven hundred seventy-seven million, six hundred ninety-three thousand, sixteen".