27477638451 has 16 divisors (see below), whose sum is σ = 40716872320. Its totient is φ = 18314258760.

The previous prime is 27477638401. The next prime is 27477638453. The reversal of 27477638451 is 15483677472.

It is not a de Polignac number, because 27477638451 - 2¹⁹ = 27477114163 is a prime.

It is a super-2 number, since 2×27477638451² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27477638453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7536 + ... + 234546.

It is an arithmetic number, because the mean of its divisors is an integer number (2544804520).

Almost surely, 2^27477638451 is an apocalyptic number.

27477638451 is a deficient number, since it is larger than the sum of its proper divisors (13239233869).

27477638451 is a wasteful number, since it uses less digits than its factorization.

27477638451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231503 (or 231497 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 54.

The spelling of 27477638451 in words is "twenty-seven billion, four hundred seventy-seven million, six hundred thirty-eight thousand, four hundred fifty-one".