40136634540 has 96 divisors (see below), whose sum is σ = 124901300160. Its totient is φ = 10700379648.

The previous prime is 40136634533. The next prime is 40136634547. The reversal of 40136634540 is 4543663104.

40136634540 is a `hidden beast` number, since 4 + 0 + 13 + 6 + 634 + 5 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (40136634533) and next prime (40136634547).

It is a super-2 number, since 2×40136634540² (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 junction number, because it is equal to n+sod(n) for n = 40136634495 and 40136634504.

It is not an unprimeable number, because it can be changed into a prime (40136634547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3002752 + ... + 3016088.

It is an arithmetic number, because the mean of its divisors is an integer number (1301055210).

Almost surely, 2^40136634540 is an apocalyptic number.

It is an amenable number.

40136634540 is an abundant number, since it is smaller than the sum of its proper divisors (84764665620).

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

40136634540 is a wasteful number, since it uses less digits than its factorization.

40136634540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18928 (or 18920 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 40136634540 in words is "forty billion, one hundred thirty-six million, six hundred thirty-four thousand, five hundred forty".