40242640664 has 16 divisors (see below), whose sum is σ = 75935558400. Its totient is φ = 19993158432.

The previous prime is 40242640639. The next prime is 40242640673. The reversal of 40242640664 is 46604624204.

It is a super-2 number, since 2×40242640664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16018904 + ... + 16021415.

It is an arithmetic number, because the mean of its divisors is an integer number (4745972400).

Almost surely, 2^40242640664 is an apocalyptic number.

It is an amenable number.

40242640664 is a deficient number, since it is larger than the sum of its proper divisors (35692917736).

40242640664 is a wasteful number, since it uses less digits than its factorization.

40242640664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32040482 (or 32040478 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 40242640664 in words is "forty billion, two hundred forty-two million, six hundred forty thousand, six hundred sixty-four".