161402447404 has 72 divisors (see below), whose sum is σ = 329676782400. Its totient is φ = 68850101760.

The previous prime is 161402447383. The next prime is 161402447411. The reversal of 161402447404 is 404744204161.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2843469 + ... + 2899675.

It is an arithmetic number, because the mean of its divisors is an integer number (4578844200).

Almost surely, 2^161402447404 is an apocalyptic number.

It is an amenable number.

161402447404 is an abundant number, since it is smaller than the sum of its proper divisors (168274334996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161402447404 is a wasteful number, since it uses less digits than its factorization.

161402447404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56599 (or 56586 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 37.

It can be divided in two parts, 161402 and 447404, that added together give a palindrome (608806).

The spelling of 161402447404 in words is "one hundred sixty-one billion, four hundred two million, four hundred forty-seven thousand, four hundred four".