77557952 has 14 divisors (see below), whose sum is σ = 153904188. Its totient is φ = 38778944.

The previous prime is 77557951. The next prime is 77557993. The reversal of 77557952 is 25975577.

It is a junction number, because it is equal to n+sod(n) for n = 77557897 and 77557906.

It is not an unprimeable number, because it can be changed into a prime (77557951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605858 + ... + 605985.

Almost surely, 2^77557952 is an apocalyptic number.

It is an amenable number.

77557952 is a deficient number, since it is larger than the sum of its proper divisors (76346236).

77557952 is a wasteful number, since it uses less digits than its factorization.

77557952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211855 (or 1211845 counting only the distinct ones).

The product of its digits is 771750, while the sum is 47.

The square root of 77557952 is about 8806.6992681708. The cubic root of 77557952 is about 426.4571931820.

The spelling of 77557952 in words is "seventy-seven million, five hundred fifty-seven thousand, nine hundred fifty-two".