27157605431 has 4 divisors (see below), whose sum is σ = 29626478664. Its totient is φ = 24688732200.

The previous prime is 27157605413. The next prime is 27157605443. The reversal of 27157605431 is 13450675172.

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

It is not a de Polignac number, because 27157605431 - 2¹⁴ = 27157589047 is a prime.

It is a super-2 number, since 2×27157605431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27157605401) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1234436600 + ... + 1234436621.

It is an arithmetic number, because the mean of its divisors is an integer number (7406619666).

Almost surely, 2^27157605431 is an apocalyptic number.

27157605431 is a deficient number, since it is larger than the sum of its proper divisors (2468873233).

27157605431 is a wasteful number, since it uses less digits than its factorization.

27157605431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468873232.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 27157605431 in words is "twenty-seven billion, one hundred fifty-seven million, six hundred five thousand, four hundred thirty-one".