40643308464 has 80 divisors (see below), whose sum is σ = 119520278784. Its totient is φ = 11780665600.

The previous prime is 40643308451. The next prime is 40643308529. The reversal of 40643308464 is 46480334604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1661247 + ... + 1685534.

Almost surely, 2^40643308464 is an apocalyptic number.

40643308464 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40643308464 is an abundant number, since it is smaller than the sum of its proper divisors (78876970320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40643308464 is a wasteful number, since it uses less digits than its factorization.

40643308464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346826 (or 3346820 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 40643308464 in words is "forty billion, six hundred forty-three million, three hundred eight thousand, four hundred sixty-four".