2640293492418 has 12 divisors (see below), whose sum is σ = 5720635900278. Its totient is φ = 880097830800.

The previous prime is 2640293492413. The next prime is 2640293492443. The reversal of 2640293492418 is 8142943920462.

2640293492418 is a `hidden beast` number, since 2 + 64 + 0 + 2 + 93 + 492 + 4 + 1 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1344377637729 + 1295915854689 = 1159473^2 + 1138383^2 .

It is a super-2 number, since 2×2640293492418² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2640293492411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73341485883 + ... + 73341485918.

Almost surely, 2^{2640293492418} is an apocalyptic number.

2640293492418 is an abundant number, since it is smaller than the sum of its proper divisors (3080342407860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640293492418 is a wasteful number, since it uses less digits than its factorization.

2640293492418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146682971809 (or 146682971806 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 2640293492418 in words is "two trillion, six hundred forty billion, two hundred ninety-three million, four hundred ninety-two thousand, four hundred eighteen".