401321516017 has 4 divisors (see below), whose sum is σ = 424928664036. Its totient is φ = 377714368000.

The previous prime is 401321516009. The next prime is 401321516027. The reversal of 401321516017 is 710615123104.

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 175155642256 + 226165873761 = 418516^2 + 475569^2 .

It is a cyclic number.

It is not a de Polignac number, because 401321516017 - 2³ = 401321516009 is a prime.

It is a super-2 number, since 2×401321516017² (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 401321516017.

It is not an unprimeable number, because it can be changed into a prime (401321516027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11803573984 + ... + 11803574017.

It is an arithmetic number, because the mean of its divisors is an integer number (106232166009).

Almost surely, 2^401321516017 is an apocalyptic number.

It is an amenable number.

401321516017 is a deficient number, since it is larger than the sum of its proper divisors (23607148019).

401321516017 is a wasteful number, since it uses less digits than its factorization.

401321516017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23607148018.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 401321516017 in words is "four hundred one billion, three hundred twenty-one million, five hundred sixteen thousand, seventeen".