404951504164 has 9 divisors (see below), whose sum is σ = 708667359547. Its totient is φ = 202475115724.

The previous prime is 404951504161. The next prime is 404951504201. The reversal of 404951504164 is 461405159404.

The square root of 404951504164 is 636358.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×404951504164² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404951504164.

It is not an unprimeable number, because it can be changed into a prime (404951504161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1113627 + ... + 1431805.

Almost surely, 2^404951504164 is an apocalyptic number.

404951504164 is the 636358-th square number.

It is an amenable number.

404951504164 is a deficient number, since it is larger than the sum of its proper divisors (303715855383).

404951504164 is an frugal number, since it uses more digits than its factorization.

404951504164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636362 (or 318181 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 404951504164 in words is "four hundred four billion, nine hundred fifty-one million, five hundred four thousand, one hundred sixty-four".