401554566 has 24 divisors (see below), whose sum is σ = 994325904. Its totient is φ = 114729840.

The previous prime is 401554547. The next prime is 401554589. The reversal of 401554566 is 665455104.

401554566 is a `hidden beast` number, since 40 + 1 + 5 + 54 + 566 = 666.

It is a super-2 number, since 2×401554566² = 322492138950896712, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 401554566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1593345 + ... + 1593596.

It is an arithmetic number, because the mean of its divisors is an integer number (41430246).

Almost surely, 2^401554566 is an apocalyptic number.

401554566 is an abundant number, since it is smaller than the sum of its proper divisors (592771338).

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

401554566 is a wasteful number, since it uses less digits than its factorization.

401554566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186956 (or 3186953 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 401554566 is about 20038.8264626450. The cubic root of 401554566 is about 737.7595775333.

The spelling of 401554566 in words is "four hundred one million, five hundred fifty-four thousand, five hundred sixty-six".