27640418975 has 36 divisors (see below), whose sum is σ = 37246149576. Its totient is φ = 20338381440.

The previous prime is 27640418951. The next prime is 27640419007. The reversal of 27640418975 is 57981404672.

It is not a de Polignac number, because 27640418975 - 2¹⁴ = 27640402591 is a prime.

It is a super-2 number, since 2×27640418975² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1184117 + ... + 1207233.

It is an arithmetic number, because the mean of its divisors is an integer number (1034615266).

Almost surely, 2^27640418975 is an apocalyptic number.

27640418975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27640418975 is a deficient number, since it is larger than the sum of its proper divisors (9605730601).

27640418975 is a wasteful number, since it uses less digits than its factorization.

27640418975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23436 (or 23418 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 27640418975 in words is "twenty-seven billion, six hundred forty million, four hundred eighteen thousand, nine hundred seventy-five".