77445956 has 12 divisors (see below), whose sum is σ = 154891968. Its totient is φ = 33191112.

The previous prime is 77445943. The next prime is 77445971. The reversal of 77445956 is 65954477.

77445956 is an admirable number.

It is a super-2 number, since 2×77445956² = 11995752201507872, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77445956.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382936 + ... + 1382991.

It is an arithmetic number, because the mean of its divisors is an integer number (12907664).

Almost surely, 2^77445956 is an apocalyptic number.

It is an amenable number.

77445956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77445956 is a wasteful number, since it uses less digits than its factorization.

77445956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765938 (or 2765936 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 47.

The square root of 77445956 is about 8800.3384025843. The cubic root of 77445956 is about 426.2518219866.

The spelling of 77445956 in words is "seventy-seven million, four hundred forty-five thousand, nine hundred fifty-six".