40020765373566 has 24 divisors (see below), whose sum is σ = 87809274240480. Its totient is φ = 13171391135136.

The previous prime is 40020765373513. The next prime is 40020765373577. The reversal of 40020765373566 is 66537356702004.

40020765373566 is a `hidden beast` number, since 4 + 0 + 0 + 2 + 0 + 7 + 6 + 5 + 3 + 73 + 566 = 666.

It is a super-2 number, since 2×40020765373566² (a number of 28 digits) contains 22 as substring.

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, 14071997655 + ... + 14072000498.

It is an arithmetic number, because the mean of its divisors is an integer number (3658719760020).

Almost surely, 2^{40020765373566} is an apocalyptic number.

40020765373566 is an abundant number, since it is smaller than the sum of its proper divisors (47788508866914).

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

40020765373566 is a wasteful number, since it uses less digits than its factorization.

40020765373566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28143998240 (or 28143998237 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 54.

The spelling of 40020765373566 in words is "forty trillion, twenty billion, seven hundred sixty-five million, three hundred seventy-three thousand, five hundred sixty-six".