401943667321 has 96 divisors (see below), whose sum is σ = 514784083968. Its totient is φ = 306994302720.

The previous prime is 401943667319. The next prime is 401943667339. The reversal of 401943667321 is 123766349104.

It is not a de Polignac number, because 401943667321 - 2¹ = 401943667319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401943667121) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 369772840 + ... + 369773926.

It is an arithmetic number, because the mean of its divisors is an integer number (5362334208).

Almost surely, 2^401943667321 is an apocalyptic number.

401943667321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

401943667321 is a deficient number, since it is larger than the sum of its proper divisors (112840416647).

401943667321 is a wasteful number, since it uses less digits than its factorization.

401943667321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 401943667321 in words is "four hundred one billion, nine hundred forty-three million, six hundred sixty-seven thousand, three hundred twenty-one".