201233889864 has 128 divisors (see below), whose sum is σ = 649665792000. Its totient is φ = 56520873792.

The previous prime is 201233889841. The next prime is 201233889929. The reversal of 201233889864 is 468988332102.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 201233889864.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1038684 + ... + 1217099.

It is an arithmetic number, because the mean of its divisors is an integer number (5075514000).

Almost surely, 2^201233889864 is an apocalyptic number.

201233889864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201233889864 is an abundant number, since it is smaller than the sum of its proper divisors (448431902136).

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

201233889864 is a wasteful number, since it uses less digits than its factorization.

201233889864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255864 (or 2255854 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 201233889864 in words is "two hundred one billion, two hundred thirty-three million, eight hundred eighty-nine thousand, eight hundred sixty-four".