27857626231 has 4 divisors (see below), whose sum is σ = 28144818352. Its totient is φ = 27570434112.

The previous prime is 27857626213. The next prime is 27857626297. The reversal of 27857626231 is 13262675872.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27857626231 is a prime.

It is a super-2 number, since 2×27857626231² (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 (27857626331) 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, 143595915 + ... + 143596108.

It is an arithmetic number, because the mean of its divisors is an integer number (7036204588).

Almost surely, 2^27857626231 is an apocalyptic number.

27857626231 is a deficient number, since it is larger than the sum of its proper divisors (287192121).

27857626231 is an equidigital number, since it uses as much as digits as its factorization.

27857626231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287192120.

The product of its digits is 1693440, while the sum is 49.

The spelling of 27857626231 in words is "twenty-seven billion, eight hundred fifty-seven million, six hundred twenty-six thousand, two hundred thirty-one".