189827586381 has 32 divisors (see below), whose sum is σ = 270003456000. Its totient is φ = 118286517888.

The previous prime is 189827586349. The next prime is 189827586397. The reversal of 189827586381 is 183685728981.

It is not a de Polignac number, because 189827586381 - 2⁵ = 189827586349 is a prime.

It is a super-2 number, since 2×189827586381² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189827586341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2308390 + ... + 2389208.

It is an arithmetic number, because the mean of its divisors is an integer number (8437608000).

Almost surely, 2^189827586381 is an apocalyptic number.

It is an amenable number.

189827586381 is a deficient number, since it is larger than the sum of its proper divisors (80175869619).

189827586381 is a wasteful number, since it uses less digits than its factorization.

189827586381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81393.

The product of its digits is 46448640, while the sum is 66.

The spelling of 189827586381 in words is "one hundred eighty-nine billion, eight hundred twenty-seven million, five hundred eighty-six thousand, three hundred eighty-one".