189668816154 has 24 divisors (see below), whose sum is σ = 412586358912. Its totient is φ = 62971053000.

The previous prime is 189668816137. The next prime is 189668816209. The reversal of 189668816154 is 451618866981.

189668816154 is a `hidden beast` number, since 1 + 8 + 9 + 6 + 6 + 8 + 8 + 1 + 615 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 189668816091 and 189668816100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20985834 + ... + 20994869.

It is an arithmetic number, because the mean of its divisors is an integer number (17191098288).

Almost surely, 2^189668816154 is an apocalyptic number.

189668816154 is an abundant number, since it is smaller than the sum of its proper divisors (222917542758).

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

189668816154 is a wasteful number, since it uses less digits than its factorization.

189668816154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41980962 (or 41980959 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 63.

The spelling of 189668816154 in words is "one hundred eighty-nine billion, six hundred sixty-eight million, eight hundred sixteen thousand, one hundred fifty-four".