77685057275 has 24 divisors (see below), whose sum is σ = 115885082880. Its totient is φ = 50466080160.

The previous prime is 77685057193. The next prime is 77685057287. The reversal of 77685057275 is 57275058677.

It is a de Polignac number, because none of the positive numbers 2^k-77685057275 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11678639 + ... + 11685288.

It is an arithmetic number, because the mean of its divisors is an integer number (4828545120).

Almost surely, 2^77685057275 is an apocalyptic number.

77685057275 is a deficient number, since it is larger than the sum of its proper divisors (38200025605).

77685057275 is a wasteful number, since it uses less digits than its factorization.

77685057275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23363963 (or 23363958 counting only the distinct ones).

The product of its (nonzero) digits is 28812000, while the sum is 59.

The spelling of 77685057275 in words is "seventy-seven billion, six hundred eighty-five million, fifty-seven thousand, two hundred seventy-five".