400940566016 has 40 divisors (see below), whose sum is σ = 804894935064. Its totient is φ = 199520133120.

The previous prime is 400940565989. The next prime is 400940566049. The reversal of 400940566016 is 610665049004.

It is a super-2 number, since 2×400940566016² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747625 + ... + 1963688.

Almost surely, 2^400940566016 is an apocalyptic number.

It is an amenable number.

400940566016 is an abundant number, since it is smaller than the sum of its proper divisors (403954369048).

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

400940566016 is an equidigital number, since it uses as much as digits as its factorization.

400940566016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711542 (or 3711526 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 400940566016 in words is "four hundred billion, nine hundred forty million, five hundred sixty-six thousand, sixteen".