77138227564 has 12 divisors (see below), whose sum is σ = 135094251600. Its totient is φ = 38539869968.

The previous prime is 77138227559. The next prime is 77138227589. The reversal of 77138227564 is 46572283177.

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, 7305019 + ... + 7315570.

It is an arithmetic number, because the mean of its divisors is an integer number (11257854300).

Almost surely, 2^77138227564 is an apocalyptic number.

It is an amenable number.

77138227564 is a deficient number, since it is larger than the sum of its proper divisors (57956024036).

77138227564 is a wasteful number, since it uses less digits than its factorization.

77138227564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14621912 (or 14621910 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 52.

The spelling of 77138227564 in words is "seventy-seven billion, one hundred thirty-eight million, two hundred twenty-seven thousand, five hundred sixty-four".