191968102801890 has 48 divisors (see below), whose sum is σ = 499139387405568. Its totient is φ = 51189204837408.

The previous prime is 191968102801889. The next prime is 191968102801903. The reversal of 191968102801890 is 98108201869191.

191968102801890 is a `hidden beast` number, since 1 + 9 + 196 + 81 + 0 + 280 + 1 + 8 + 90 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45668352 + ... + 49694411.

It is an arithmetic number, because the mean of its divisors is an integer number (10398737237616).

Almost surely, 2^{191968102801890} is an apocalyptic number.

191968102801890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191968102801890 is an abundant number, since it is smaller than the sum of its proper divisors (307171284603678).

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

191968102801890 is a wasteful number, since it uses less digits than its factorization.

191968102801890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95385143 (or 95385140 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 63.

The spelling of 191968102801890 in words is "one hundred ninety-one trillion, nine hundred sixty-eight billion, one hundred two million, eight hundred one thousand, eight hundred ninety".