40637226507661 has 16 divisors (see below), whose sum is σ = 46877981368320. Its totient is φ = 34505350210800.

The previous prime is 40637226507601. The next prime is 40637226507751. The reversal of 40637226507661 is 16670562273604.

It is a happy number.

It is not a de Polignac number, because 40637226507661 - 2²⁵ = 40637192953229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40637226507601) 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, 24939180 + ... + 26518618.

It is an arithmetic number, because the mean of its divisors is an integer number (2929873835520).

Almost surely, 2^{40637226507661} is an apocalyptic number.

It is an amenable number.

40637226507661 is a deficient number, since it is larger than the sum of its proper divisors (6240754860659).

40637226507661 is a wasteful number, since it uses less digits than its factorization.

40637226507661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613904.

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 40637226507661 in words is "forty trillion, six hundred thirty-seven billion, two hundred twenty-six million, five hundred seven thousand, six hundred sixty-one".