40231541556 has 36 divisors (see below), whose sum is σ = 107678539332. Its totient is φ = 12621659904.

The previous prime is 40231541521. The next prime is 40231541587. The reversal of 40231541556 is 65514513204.

40231541556 is a `hidden beast` number, since 4 + 0 + 231 + 5 + 415 + 5 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34397637156 + 5833904400 = 185466^2 + 76380^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40231541556² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40231541556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32868295 + ... + 32869518.

It is an arithmetic number, because the mean of its divisors is an integer number (2991070537).

Almost surely, 2^40231541556 is an apocalyptic number.

It is an amenable number.

40231541556 is an abundant number, since it is smaller than the sum of its proper divisors (67446997776).

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

40231541556 is a wasteful number, since it uses less digits than its factorization.

40231541556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65737840 (or 65737835 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 40231541556 in words is "forty billion, two hundred thirty-one million, five hundred forty-one thousand, five hundred fifty-six".