189237689408 has 14 divisors (see below), whose sum is σ = 375518540046. Its totient is φ = 94618844672.

The previous prime is 189237689401. The next prime is 189237689423. The reversal of 189237689408 is 804986732981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 106620534784 + 82617154624 = 326528^2 + 287432^2 .

It is not an unprimeable number, because it can be changed into a prime (189237689401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1478419385 + ... + 1478419512.

Almost surely, 2^189237689408 is an apocalyptic number.

It is an amenable number.

189237689408 is a deficient number, since it is larger than the sum of its proper divisors (186280850638).

189237689408 is an equidigital number, since it uses as much as digits as its factorization.

189237689408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956838909 (or 2956838899 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 65.

The spelling of 189237689408 in words is "one hundred eighty-nine billion, two hundred thirty-seven million, six hundred eighty-nine thousand, four hundred eight".