64057056778 has 16 divisors (see below), whose sum is σ = 112883764896. Its totient is φ = 26877086640.

The previous prime is 64057056761. The next prime is 64057056823. The reversal of 64057056778 is 87765075046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111987576 + ... + 111988147.

It is an arithmetic number, because the mean of its divisors is an integer number (7055235306).

Almost surely, 2^64057056778 is an apocalyptic number.

64057056778 is a deficient number, since it is larger than the sum of its proper divisors (48826708118).

64057056778 is a wasteful number, since it uses less digits than its factorization.

64057056778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223975749.

The product of its (nonzero) digits is 9878400, while the sum is 55.

The spelling of 64057056778 in words is "sixty-four billion, fifty-seven million, fifty-six thousand, seven hundred seventy-eight".