77685057276 has 24 divisors (see below), whose sum is σ = 182017277904. Its totient is φ = 25787569920.

The previous prime is 77685057193. The next prime is 77685057287. The reversal of 77685057276 is 67275058677.

It is a happy number.

It is a congruent 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, 13428135 + ... + 13433918.

It is an arithmetic number, because the mean of its divisors is an integer number (7584053246).

Almost surely, 2^77685057276 is an apocalyptic number.

It is an amenable number.

77685057276 is an abundant number, since it is smaller than the sum of its proper divisors (104332220628).

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

77685057276 is a wasteful number, since it uses less digits than its factorization.

77685057276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26862301 (or 26862299 counting only the distinct ones).

The product of its (nonzero) digits is 34574400, while the sum is 60.

The spelling of 77685057276 in words is "seventy-seven billion, six hundred eighty-five million, fifty-seven thousand, two hundred seventy-six".