77922855936 has 264 divisors, whose sum is σ = 250784192880. Its totient is φ = 23158849536.

The previous prime is 77922855929. The next prime is 77922855947. The reversal of 77922855936 is 63955822977.

77922855936 is a `hidden beast` number, since 7 + 79 + 2 + 2 + 8 + 559 + 3 + 6 = 666.

It is a super-2 number, since 2×77922855936² (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 23 ways as a sum of consecutive naturals, for example, 2963680 + ... + 2989856.

Almost surely, 2^77922855936 is an apocalyptic number.

77922855936 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77922855936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125392096440).

77922855936 is an abundant number, since it is smaller than the sum of its proper divisors (172861336944).

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

77922855936 is a wasteful number, since it uses less digits than its factorization.

77922855936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26239 (or 26218 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The spelling of 77922855936 in words is "seventy-seven billion, nine hundred twenty-two million, eight hundred fifty-five thousand, nine hundred thirty-six".