405500978226 has 64 divisors (see below), whose sum is σ = 836900812800. Its totient is φ = 130886369280.

The previous prime is 405500978191. The next prime is 405500978279. The reversal of 405500978226 is 622879005504.

405500978226 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×405500978226² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84494575 + ... + 84499373.

It is an arithmetic number, because the mean of its divisors is an integer number (13076575200).

Almost surely, 2^405500978226 is an apocalyptic number.

405500978226 is an abundant number, since it is smaller than the sum of its proper divisors (431399834574).

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

405500978226 is a wasteful number, since it uses less digits than its factorization.

405500978226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6579.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 405500978226 in words is "four hundred five billion, five hundred million, nine hundred seventy-eight thousand, two hundred twenty-six".