27725137431 has 16 divisors (see below), whose sum is σ = 37384089600. Its totient is φ = 18275515488.

The previous prime is 27725137393. The next prime is 27725137439. The reversal of 27725137431 is 13473152772.

It is not a de Polignac number, because 27725137431 - 2⁶ = 27725137367 is a prime.

It is a super-2 number, since 2×27725137431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27725137439) 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, 68130 + ... + 245136.

It is an arithmetic number, because the mean of its divisors is an integer number (2336505600).

Almost surely, 2^27725137431 is an apocalyptic number.

27725137431 is a deficient number, since it is larger than the sum of its proper divisors (9658952169).

27725137431 is a wasteful number, since it uses less digits than its factorization.

27725137431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177598.

The product of its digits is 246960, while the sum is 42.

The spelling of 27725137431 in words is "twenty-seven billion, seven hundred twenty-five million, one hundred thirty-seven thousand, four hundred thirty-one".