801955881 has 36 divisors (see below), whose sum is σ = 1227215808. Its totient is φ = 503692992.

The previous prime is 801955873. The next prime is 801955883. The reversal of 801955881 is 188559108.

801955881 is a `hidden beast` number, since 8 + 0 + 19 + 558 + 81 = 666.

801955881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 801955881 - 2³ = 801955873 is a prime.

It is a super-2 number, since 2×801955881² = 1286266470140972322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (801955883) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1102740 + ... + 1103466.

It is an arithmetic number, because the mean of its divisors is an integer number (34089328).

Almost surely, 2^801955881 is an apocalyptic number.

It is an amenable number.

801955881 is a deficient number, since it is larger than the sum of its proper divisors (425259927).

801955881 is a wasteful number, since it uses less digits than its factorization.

801955881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The square root of 801955881 is about 28318.8255582748. The cubic root of 801955881 is about 929.0736839726.

The spelling of 801955881 in words is "eight hundred one million, nine hundred fifty-five thousand, eight hundred eighty-one".