27777675137 has 4 divisors (see below), whose sum is σ = 27779295060. Its totient is φ = 27776055216.

The previous prime is 27777675097. The next prime is 27777675179. The reversal of 27777675137 is 73157677772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11628602896 + 16149072241 = 107836^2 + 127079^2 .

It is a cyclic number.

It is not a de Polignac number, because 27777675137 - 2³⁰ = 26703933313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27777695137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783962 + ... + 818627.

It is an arithmetic number, because the mean of its divisors is an integer number (6944823765).

Almost surely, 2^27777675137 is an apocalyptic number.

It is an amenable number.

27777675137 is a deficient number, since it is larger than the sum of its proper divisors (1619923).

27777675137 is a wasteful number, since it uses less digits than its factorization.

27777675137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619922.

The product of its digits is 21176820, while the sum is 59.

The spelling of 27777675137 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-five thousand, one hundred thirty-seven".