40253657634 has 12 divisors (see below), whose sum is σ = 87216258246. Its totient is φ = 13417885872.

The previous prime is 40253657603. The next prime is 40253657663. The reversal of 40253657634 is 43675635204.

40253657634 is a `hidden beast` number, since 4 + 0 + 2 + 5 + 3 + 6 + 5 + 7 + 634 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38672402409 + 1581255225 = 196653^2 + 39765^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40253657634.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1118157139 + ... + 1118157174.

Almost surely, 2^40253657634 is an apocalyptic number.

40253657634 is an abundant number, since it is smaller than the sum of its proper divisors (46962600612).

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

40253657634 is a wasteful number, since it uses less digits than its factorization.

40253657634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236314321 (or 2236314318 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 45.

The spelling of 40253657634 in words is "forty billion, two hundred fifty-three million, six hundred fifty-seven thousand, six hundred thirty-four".