27877637764 has 6 divisors (see below), whose sum is σ = 48785866094. Its totient is φ = 13938818880.

The previous prime is 27877637743. The next prime is 27877637771. The reversal of 27877637764 is 46773677872.

It can be written as a sum of positive squares in only one way, i.e., 27502905600 + 374732164 = 165840^2 + 19358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27877637696 and 27877637705.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3484704717 + ... + 3484704724.

Almost surely, 2^27877637764 is an apocalyptic number.

It is an amenable number.

27877637764 is a deficient number, since it is larger than the sum of its proper divisors (20908228330).

27877637764 is a wasteful number, since it uses less digits than its factorization.

27877637764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6969409445 (or 6969409443 counting only the distinct ones).

The product of its digits is 116169984, while the sum is 64.

The spelling of 27877637764 in words is "twenty-seven billion, eight hundred seventy-seven million, six hundred thirty-seven thousand, seven hundred sixty-four".