189893998468971 has 12 divisors (see below), whose sum is σ = 274291452488872. Its totient is φ = 126595942963776.

The previous prime is 189893998468957. The next prime is 189893998468981. The reversal of 189893998468971 is 179864899398981.

189893998468971 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 9 + 399 + 84 + 68 + 9 + 71 = 666.

It is not a de Polignac number, because 189893998468971 - 2²² = 189893994274667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189893998468921) 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, 31783320 + ... + 37282266.

Almost surely, 2^{189893998468971} is an apocalyptic number.

189893998468971 is a deficient number, since it is larger than the sum of its proper divisors (84397454019901).

189893998468971 is a wasteful number, since it uses less digits than its factorization.

189893998468971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9335930 (or 9335927 counting only the distinct ones).

The product of its digits is 121899810816, while the sum is 99.

The spelling of 189893998468971 in words is "one hundred eighty-nine trillion, eight hundred ninety-three billion, nine hundred ninety-eight million, four hundred sixty-eight thousand, nine hundred seventy-one".