189639057721288 has 32 divisors (see below), whose sum is σ = 406871720265600. Its totient is φ = 81173419708032.

The previous prime is 189639057721277. The next prime is 189639057721319. The reversal of 189639057721288 is 882127750936981.

It is a super-2 number, since 2×189639057721288² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2092916220 + ... + 2093006827.

It is an arithmetic number, because the mean of its divisors is an integer number (12714741258300).

Almost surely, 2^{189639057721288} is an apocalyptic number.

It is an amenable number.

189639057721288 is an abundant number, since it is smaller than the sum of its proper divisors (217232662544312).

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

189639057721288 is a wasteful number, since it uses less digits than its factorization.

189639057721288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185923869 (or 4185923865 counting only the distinct ones).

The product of its (nonzero) digits is 731566080, while the sum is 76.

The spelling of 189639057721288 in words is "one hundred eighty-nine trillion, six hundred thirty-nine billion, fifty-seven million, seven hundred twenty-one thousand, two hundred eighty-eight".