398044057561 has 16 divisors (see below), whose sum is σ = 411894849600. Its totient is φ = 384436248768.

The previous prime is 398044057517. The next prime is 398044057589. The reversal of 398044057561 is 165750440893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398044057561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398044057499 and 398044057508.

It is not an unprimeable number, because it can be changed into a prime (398044057261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5142495 + ... + 5219323.

It is an arithmetic number, because the mean of its divisors is an integer number (25743428100).

Almost surely, 2^398044057561 is an apocalyptic number.

It is an amenable number.

398044057561 is a deficient number, since it is larger than the sum of its proper divisors (13850792039).

398044057561 is a wasteful number, since it uses less digits than its factorization.

398044057561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78408.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 398044057561 in words is "three hundred ninety-eight billion, forty-four million, fifty-seven thousand, five hundred sixty-one".