40040646651 has 20 divisors (see below), whose sum is σ = 59994552024. Its totient is φ = 26613100800.

The previous prime is 40040646641. The next prime is 40040646673. The reversal of 40040646651 is 15664604004.

40040646651 is a `hidden beast` number, since 4 + 0 + 0 + 4 + 0 + 646 + 6 + 5 + 1 = 666.

It is not a de Polignac number, because 40040646651 - 2⁵ = 40040646619 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40040646641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 719910 + ... + 773531.

Almost surely, 2^40040646651 is an apocalyptic number.

40040646651 is a deficient number, since it is larger than the sum of its proper divisors (19953905373).

40040646651 is a wasteful number, since it uses less digits than its factorization.

40040646651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493784 (or 1493775 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 40040646651 in words is "forty billion, forty million, six hundred forty-six thousand, six hundred fifty-one".