40136055921 has 24 divisors (see below), whose sum is σ = 62442184896. Its totient is φ = 24695820000.

The previous prime is 40136055919. The next prime is 40136055929. The reversal of 40136055921 is 12955063104.

40136055921 is a `hidden beast` number, since 4 + 0 + 1 + 3 + 60 + 5 + 592 + 1 = 666.

It is not a de Polignac number, because 40136055921 - 2¹ = 40136055919 is a prime.

It is a super-2 number, since 2×40136055921² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40136055929) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1089046 + ... + 1125296.

It is an arithmetic number, because the mean of its divisors is an integer number (2601757704).

Almost surely, 2^40136055921 is an apocalyptic number.

It is an amenable number.

40136055921 is a deficient number, since it is larger than the sum of its proper divisors (22306128975).

40136055921 is a wasteful number, since it uses less digits than its factorization.

40136055921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45733 (or 45730 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 40136055921 in words is "forty billion, one hundred thirty-six million, fifty-five thousand, nine hundred twenty-one".