405761025645 has 64 divisors (see below), whose sum is σ = 785502432000. Its totient is φ = 197946540288.

The previous prime is 405761025641. The next prime is 405761025707. The reversal of 405761025645 is 546520167504.

405761025645 is a `hidden beast` number, since 4 + 0 + 5 + 7 + 610 + 25 + 6 + 4 + 5 = 666.

It is not a de Polignac number, because 405761025645 - 2² = 405761025641 is a prime.

It is a super-3 number, since 3×405761025645³ (a number of 36 digits) contains 333 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 405761025645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405761025641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2653054 + ... + 2801823.

It is an arithmetic number, because the mean of its divisors is an integer number (12273475500).

Almost surely, 2^405761025645 is an apocalyptic number.

405761025645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

405761025645 is a deficient number, since it is larger than the sum of its proper divisors (379741406355).

405761025645 is a wasteful number, since it uses less digits than its factorization.

405761025645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454939 (or 5454933 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The spelling of 405761025645 in words is "four hundred five billion, seven hundred sixty-one million, twenty-five thousand, six hundred forty-five".