191868920315 has 8 divisors (see below), whose sum is σ = 236465480400. Its totient is φ = 149346618912.

The previous prime is 191868920293. The next prime is 191868920387. The reversal of 191868920315 is 513029868191.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 191868920315 - 2¹⁴ = 191868903931 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518564465 + ... + 518564834.

It is an arithmetic number, because the mean of its divisors is an integer number (29558185050).

Almost surely, 2^191868920315 is an apocalyptic number.

191868920315 is a deficient number, since it is larger than the sum of its proper divisors (44596560085).

191868920315 is a wasteful number, since it uses less digits than its factorization.

191868920315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037129341.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 191868920315 in words is "one hundred ninety-one billion, eight hundred sixty-eight million, nine hundred twenty thousand, three hundred fifteen".