40371391656 has 64 divisors (see below), whose sum is σ = 112163443200. Its totient is φ = 13454648064.

The previous prime is 40371391651. The next prime is 40371391661. The reversal of 40371391656 is 65619317304.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40371391651) and next prime (40371391661).

It is not an unprimeable number, because it can be changed into a prime (40371391651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441321 + ... + 1469063.

It is an arithmetic number, because the mean of its divisors is an integer number (1752553800).

Almost surely, 2^40371391656 is an apocalyptic number.

It is an amenable number.

40371391656 is an abundant number, since it is smaller than the sum of its proper divisors (71792051544).

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

40371391656 is a wasteful number, since it uses less digits than its factorization.

40371391656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34495 (or 34485 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 40371391656 in words is "forty billion, three hundred seventy-one million, three hundred ninety-one thousand, six hundred fifty-six".