189617967393856 has 21 divisors (see below), whose sum is σ = 376273372648981. Its totient is φ = 94808928616192.

The previous prime is 189617967393793. The next prime is 189617967393871. The reversal of 189617967393856 is 658393769716981.

It is a happy number.

The square root of 189617967393856 is 13770184.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 334963137600 + 189283004256256 = 578760^2 + 13758016^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 109300836 + ... + 111022108.

Almost surely, 2^{189617967393856} is an apocalyptic number.

189617967393856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

189617967393856 is the 13770184-th square number.

It is an amenable number.

189617967393856 is a deficient number, since it is larger than the sum of its proper divisors (186655405255125).

189617967393856 is an frugal number, since it uses more digits than its factorization.

189617967393856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442558 (or 1721275 counting only the distinct ones).

The product of its digits is 22221319680, while the sum is 88.

The spelling of 189617967393856 in words is "one hundred eighty-nine trillion, six hundred seventeen billion, nine hundred sixty-seven million, three hundred ninety-three thousand, eight hundred fifty-six".