77959538312 has 72 divisors (see below), whose sum is σ = 154343157150. Its totient is φ = 36913582464.

The previous prime is 77959538311. The next prime is 77959538329. The reversal of 77959538312 is 21383595977.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 44794029316 + 33165508996 = 211646^2 + 182114^2 .

It is a super-2 number, since 2×77959538312² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77959538311) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 48451364 + ... + 48452972.

Almost surely, 2^77959538312 is an apocalyptic number.

It is an amenable number.

77959538312 is a deficient number, since it is larger than the sum of its proper divisors (76383618838).

77959538312 is a wasteful number, since it uses less digits than its factorization.

77959538312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875 (or 1741 counting only the distinct ones).

The product of its digits is 14288400, while the sum is 59.

The spelling of 77959538312 in words is "seventy-seven billion, nine hundred fifty-nine million, five hundred thirty-eight thousand, three hundred twelve".