40160643664 has 20 divisors (see below), whose sum is σ = 78972611104. Its totient is φ = 19780615008.

The previous prime is 40160643569. The next prime is 40160643683. The reversal of 40160643664 is 46634606104.

It is a super-2 number, since 2×40160643664² (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, 18730572 + ... + 18732715.

Almost surely, 2^40160643664 is an apocalyptic number.

It is an amenable number.

40160643664 is a deficient number, since it is larger than the sum of its proper divisors (38811967440).

40160643664 is a wasteful number, since it uses less digits than its factorization.

40160643664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37463362 (or 37463356 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 40160643664 in words is "forty billion, one hundred sixty million, six hundred forty-three thousand, six hundred sixty-four".