405717091172 has 12 divisors (see below), whose sum is σ = 710620706796. Its totient is φ = 202682603520.

The previous prime is 405717091067. The next prime is 405717091181. The reversal of 405717091172 is 271190717504.

It can be written as a sum of positive squares in 2 ways, for example, as 241654829056 + 164062262116 = 491584^2 + 405046^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43980329 + ... + 43989552.

It is an arithmetic number, because the mean of its divisors is an integer number (59218392233).

Almost surely, 2^405717091172 is an apocalyptic number.

It is an amenable number.

405717091172 is a deficient number, since it is larger than the sum of its proper divisors (304903615624).

405717091172 is a wasteful number, since it uses less digits than its factorization.

405717091172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87971038 (or 87971036 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 44.

The spelling of 405717091172 in words is "four hundred five billion, seven hundred seventeen million, ninety-one thousand, one hundred seventy-two".