404530320645 has 48 divisors (see below), whose sum is σ = 764995368384. Its totient is φ = 196119168000.

The previous prime is 404530320637. The next prime is 404530320679. The reversal of 404530320645 is 546023035404.

404530320645 is a `hidden beast` number, since 4 + 0 + 4 + 5 + 3 + 0 + 3 + 2 + 0 + 645 = 666.

It is not a de Polignac number, because 404530320645 - 2³ = 404530320637 is a prime.

It is a super-2 number, since 2×404530320645² (a number of 24 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 47 ways as a sum of consecutive naturals, for example, 7343605 + ... + 7398485.

It is an arithmetic number, because the mean of its divisors is an integer number (15937403508).

Almost surely, 2^404530320645 is an apocalyptic number.

404530320645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404530320645 is a deficient number, since it is larger than the sum of its proper divisors (360465047739).

404530320645 is a wasteful number, since it uses less digits than its factorization.

404530320645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69794 (or 69791 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The spelling of 404530320645 in words is "four hundred four billion, five hundred thirty million, three hundred twenty thousand, six hundred forty-five".