189885978504 has 48 divisors (see below), whose sum is σ = 514346105520. Its totient is φ = 63286516320.

The previous prime is 189885978449. The next prime is 189885978509. The reversal of 189885978504 is 405879588981.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (189885978509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347959 + ... + 707705.

It is an arithmetic number, because the mean of its divisors is an integer number (10715543865).

Almost surely, 2^189885978504 is an apocalyptic number.

It is an amenable number.

189885978504 is an abundant number, since it is smaller than the sum of its proper divisors (324460127016).

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

189885978504 is a wasteful number, since it uses less digits than its factorization.

189885978504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367090 (or 367083 counting only the distinct ones).

The product of its (nonzero) digits is 232243200, while the sum is 72.

The spelling of 189885978504 in words is "one hundred eighty-nine billion, eight hundred eighty-five million, nine hundred seventy-eight thousand, five hundred four".