189662108217 has 16 divisors (see below), whose sum is σ = 267942654720. Its totient is φ = 118921727232.

The previous prime is 189662108201. The next prime is 189662108231. The reversal of 189662108217 is 712801266981.

It is not a de Polignac number, because 189662108217 - 2⁴ = 189662108201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 189662108217.

It is not an unprimeable number, because it can be changed into a prime (189662108257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1205617 + ... + 1353822.

It is an arithmetic number, because the mean of its divisors is an integer number (16746415920).

Almost surely, 2^189662108217 is an apocalyptic number.

189662108217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

189662108217 is a deficient number, since it is larger than the sum of its proper divisors (78280546503).

189662108217 is a wasteful number, since it uses less digits than its factorization.

189662108217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560912.

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 189662108217 in words is "one hundred eighty-nine billion, six hundred sixty-two million, one hundred eight thousand, two hundred seventeen".