40541020644555 has 24 divisors (see below), whose sum is σ = 70279798923360. Its totient is φ = 21619201839360.

The previous prime is 40541020644541. The next prime is 40541020644563. The reversal of 40541020644555 is 55544602014504.

40541020644555 is a `hidden beast` number, since 4 + 0 + 5 + 4 + 10 + 20 + 64 + 4 + 555 = 666.

It is not a de Polignac number, because 40541020644555 - 2¹⁵ = 40541020611787 is a prime.

It is a super-2 number, since 2×40541020644555² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40541020644555.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55378935 + ... + 56106224.

It is an arithmetic number, because the mean of its divisors is an integer number (2928324955140).

Almost surely, 2^{40541020644555} is an apocalyptic number.

40541020644555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40541020644555 is a deficient number, since it is larger than the sum of its proper divisors (29738778278805).

40541020644555 is a wasteful number, since it uses less digits than its factorization.

40541020644555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111493251 (or 111493248 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

The spelling of 40541020644555 in words is "forty trillion, five hundred forty-one billion, twenty million, six hundred forty-four thousand, five hundred fifty-five".