77745856 has 28 divisors (see below), whose sum is σ = 155420568. Its totient is φ = 38584832.

The previous prime is 77745827. The next prime is 77745883. The reversal of 77745856 is 65854777.

It is a happy number.

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, 4335 + ... + 13201.

Almost surely, 2^77745856 is an apocalyptic number.

It is an amenable number.

77745856 is a deficient number, since it is larger than the sum of its proper divisors (77674712).

77745856 is a wasteful number, since it uses less digits than its factorization.

77745856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9016 (or 9006 counting only the distinct ones).

The product of its digits is 1646400, while the sum is 49.

The square root of 77745856 is about 8817.3610564613. The cubic root of 77745856 is about 426.8013160092.

The spelling of 77745856 in words is "seventy-seven million, seven hundred forty-five thousand, eight hundred fifty-six".