401945556 has 12 divisors (see below), whose sum is σ = 937872992. Its totient is φ = 133981848.

The previous prime is 401945527. The next prime is 401945561. The reversal of 401945556 is 655549104.

It is a tau number, because it is divible by the number of its divisors (12).

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, 16747720 + ... + 16747743.

Almost surely, 2^401945556 is an apocalyptic number.

It is an amenable number.

401945556 is an abundant number, since it is smaller than the sum of its proper divisors (535927436).

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

401945556 is a wasteful number, since it uses less digits than its factorization.

401945556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33495470 (or 33495468 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 401945556 is about 20048.5798998333. The cubic root of 401945556 is about 737.9989497712.

The spelling of 401945556 in words is "four hundred one million, nine hundred forty-five thousand, five hundred fifty-six".