204039072091 has 8 divisors (see below), whose sum is σ = 208590649344. Its totient is φ = 199496258280.

The previous prime is 204039072049. The next prime is 204039072121. The reversal of 204039072091 is 190270930402.

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

It is not a de Polignac number, because 204039072091 - 2⁷ = 204039071963 is a prime.

It is a super-2 number, since 2×204039072091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204039072091.

It is not an unprimeable number, because it can be changed into a prime (204039072031) 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, 2143765 + ... + 2236918.

It is an arithmetic number, because the mean of its divisors is an integer number (26073831168).

Almost surely, 2^204039072091 is an apocalyptic number.

204039072091 is a deficient number, since it is larger than the sum of its proper divisors (4551577253).

204039072091 is an equidigital number, since it uses as much as digits as its factorization.

204039072091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381721.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 204039072091 in words is "two hundred four billion, thirty-nine million, seventy-two thousand, ninety-one".