405974811165 has 128 divisors (see below), whose sum is σ = 858062979072. Its totient is φ = 158684037120.

The previous prime is 405974811149. The next prime is 405974811173. The reversal of 405974811165 is 561118479504.

It is not a de Polignac number, because 405974811165 - 2⁴ = 405974811149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 32646789 + ... + 32659221.

It is an arithmetic number, because the mean of its divisors is an integer number (6703617024).

Almost surely, 2^405974811165 is an apocalyptic number.

It is an amenable number.

405974811165 is an abundant number, since it is smaller than the sum of its proper divisors (452088167907).

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

405974811165 is a wasteful number, since it uses less digits than its factorization.

405974811165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14139.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 405974811165 in words is "four hundred five billion, nine hundred seventy-four million, eight hundred eleven thousand, one hundred sixty-five".