401555163 has 8 divisors (see below), whose sum is σ = 535722768. Its totient is φ = 267545504.

The previous prime is 401555129. The next prime is 401555173. The reversal of 401555163 is 361555104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401555163 - 2²⁴ = 384777947 is a prime.

It is a super-2 number, since 2×401555163² = 322493097863913138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401555163.

It is not an unprimeable number, because it can be changed into a prime (401555123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33420 + ... + 43817.

It is an arithmetic number, because the mean of its divisors is an integer number (66965346).

Almost surely, 2^401555163 is an apocalyptic number.

401555163 is a deficient number, since it is larger than the sum of its proper divisors (134167605).

401555163 is a wasteful number, since it uses less digits than its factorization.

401555163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78973.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 401555163 is about 20038.8413587213. The cubic root of 401555163 is about 737.7599431476.

The spelling of 401555163 in words is "four hundred one million, five hundred fifty-five thousand, one hundred sixty-three".