40642309257 has 16 divisors (see below), whose sum is σ = 59374246080. Its totient is φ = 24524136000.

The previous prime is 40642309249. The next prime is 40642309259. The reversal of 40642309257 is 75290324604.

40642309257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40642309257 - 2³ = 40642309249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40642309259) 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, 2681494 + ... + 2696607.

It is an arithmetic number, because the mean of its divisors is an integer number (3710890380).

Almost surely, 2^40642309257 is an apocalyptic number.

It is an amenable number.

40642309257 is a deficient number, since it is larger than the sum of its proper divisors (18731936823).

40642309257 is a wasteful number, since it uses less digits than its factorization.

40642309257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378344.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 40642309257 in words is "forty billion, six hundred forty-two million, three hundred nine thousand, two hundred fifty-seven".