400165350454405 has 4 divisors (see below), whose sum is σ = 480198420545292. Its totient is φ = 320132280363520.

The previous prime is 400165350454369. The next prime is 400165350454423. The reversal of 400165350454405 is 504454053561004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214448581147969 + 185716769306436 = 14644063^2 + 13627794^2 .

It is not a de Polignac number, because 400165350454405 - 2²⁵ = 400165316899973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40016535045436 + ... + 40016535045445.

It is an arithmetic number, because the mean of its divisors is an integer number (120049605136323).

Almost surely, 2^{400165350454405} is an apocalyptic number.

It is an amenable number.

400165350454405 is a deficient number, since it is larger than the sum of its proper divisors (80033070090887).

400165350454405 is an equidigital number, since it uses as much as digits as its factorization.

400165350454405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80033070090886.

The product of its (nonzero) digits is 2880000, while the sum is 46.

The spelling of 400165350454405 in words is "four hundred trillion, one hundred sixty-five billion, three hundred fifty million, four hundred fifty-four thousand, four hundred five".