77563568 has 20 divisors (see below), whose sum is σ = 151115328. Its totient is φ = 38566080.

The previous prime is 77563559. The next prime is 77563621. The reversal of 77563568 is 86536577.

It is a happy number.

It is a super-2 number, since 2×77563568² = 12032214161781248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10496 + ... + 16287.

Almost surely, 2^77563568 is an apocalyptic number.

It is an amenable number.

77563568 is a deficient number, since it is larger than the sum of its proper divisors (73551760).

77563568 is a wasteful number, since it uses less digits than its factorization.

77563568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26972 (or 26966 counting only the distinct ones).

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

The square root of 77563568 is about 8807.0181105752. The cubic root of 77563568 is about 426.4674862413.

The spelling of 77563568 in words is "seventy-seven million, five hundred sixty-three thousand, five hundred sixty-eight".