40006442646 has 16 divisors (see below), whose sum is σ = 88903206000. Its totient is φ = 13335480864.

The previous prime is 40006442563. The next prime is 40006442657. The reversal of 40006442646 is 64624460004.

It is a happy number.

40006442646 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 6 + 4 + 4 + 2 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 40006442646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370429971 + ... + 370430078.

It is an arithmetic number, because the mean of its divisors is an integer number (5556450375).

Almost surely, 2^40006442646 is an apocalyptic number.

40006442646 is an abundant number, since it is smaller than the sum of its proper divisors (48896763354).

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

40006442646 is a wasteful number, since it uses less digits than its factorization.

40006442646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740860060 (or 740860054 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 40006442646 in words is "forty billion, six million, four hundred forty-two thousand, six hundred forty-six".