40631164638 has 8 divisors (see below), whose sum is σ = 81262329288. Its totient is φ = 13543721544.

The previous prime is 40631164633. The next prime is 40631164703. The reversal of 40631164638 is 83646113604.

It is a sphenic number, since it is the product of 3 distinct primes.

40631164638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 40631164638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40631164633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385930381 + ... + 3385930392.

It is an arithmetic number, because the mean of its divisors is an integer number (10157791161).

Almost surely, 2^40631164638 is an apocalyptic number.

40631164638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40631164638 is a wasteful number, since it uses less digits than its factorization.

40631164638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771860778.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 40631164638 in words is "forty billion, six hundred thirty-one million, one hundred sixty-four thousand, six hundred thirty-eight".