401955633 has 24 divisors (see below), whose sum is σ = 617718816. Its totient is φ = 250992000.

The previous prime is 401955611. The next prime is 401955643. The reversal of 401955633 is 336559104.

401955633 is a `hidden beast` number, since 4 + 0 + 1 + 95 + 563 + 3 = 666.

It is not a de Polignac number, because 401955633 - 2²⁰ = 400907057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401955643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26058 + ... + 38508.

It is an arithmetic number, because the mean of its divisors is an integer number (25738284).

Almost surely, 2^401955633 is an apocalyptic number.

It is an amenable number.

401955633 is a deficient number, since it is larger than the sum of its proper divisors (215763183).

401955633 is a wasteful number, since it uses less digits than its factorization.

401955633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12685 (or 12682 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 401955633 is about 20048.8312128164. The cubic root of 401955633 is about 738.0051170685.

The spelling of 401955633 in words is "four hundred one million, nine hundred fifty-five thousand, six hundred thirty-three".