40664643104651 has 16 divisors (see below), whose sum is σ = 42994806660000. Its totient is φ = 38353494940416.

The previous prime is 40664643104627. The next prime is 40664643104663. The reversal of 40664643104651 is 15640134646604.

It is not a de Polignac number, because 40664643104651 - 2³⁰ = 40663569362827 is a prime.

It is a super-2 number, since 2×40664643104651² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40664643104651.

It is not an unprimeable number, because it can be changed into a prime (40664643104051) 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, 63506255 + ... + 64143383.

It is an arithmetic number, because the mean of its divisors is an integer number (2687175416250).

Almost surely, 2^{40664643104651} is an apocalyptic number.

40664643104651 is a deficient number, since it is larger than the sum of its proper divisors (2330163555349).

40664643104651 is a wasteful number, since it uses less digits than its factorization.

40664643104651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652046.

The product of its (nonzero) digits is 4976640, while the sum is 50.

The spelling of 40664643104651 in words is "forty trillion, six hundred sixty-four billion, six hundred forty-three million, one hundred four thousand, six hundred fifty-one".