27777675157 has 4 divisors (see below), whose sum is σ = 29239658080. Its totient is φ = 26315692236.

The previous prime is 27777675097. The next prime is 27777675179. The reversal of 27777675157 is 75157677772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27777675157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27777675095 and 27777675104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777675257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730991433 + ... + 730991470.

It is an arithmetic number, because the mean of its divisors is an integer number (7309914520).

Almost surely, 2^27777675157 is an apocalyptic number.

It is an amenable number.

27777675157 is a deficient number, since it is larger than the sum of its proper divisors (1461982923).

27777675157 is a wasteful number, since it uses less digits than its factorization.

27777675157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461982922.

The product of its digits is 35294700, while the sum is 61.

The spelling of 27777675157 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-five thousand, one hundred fifty-seven".