400881642176 has 56 divisors (see below), whose sum is σ = 802945826160. Its totient is φ = 198566387712.

The previous prime is 400881642113. The next prime is 400881642199. The reversal of 400881642176 is 671246188004.

It is a self number, because there is not a number n which added to its sum of digits gives 400881642176.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15441815 + ... + 15467753.

Almost surely, 2^400881642176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400881642176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401472913080).

400881642176 is an abundant number, since it is smaller than the sum of its proper divisors (402064183984).

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

400881642176 is a wasteful number, since it uses less digits than its factorization.

400881642176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28201 (or 28191 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 400881642176 in words is "four hundred billion, eight hundred eighty-one million, six hundred forty-two thousand, one hundred seventy-six".