868190500091 has 4 divisors (see below), whose sum is σ = 889365878184. Its totient is φ = 847015122000.

The previous prime is 868190500061. The next prime is 868190500103. The reversal of 868190500091 is 190005091868.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 868190500091 - 2⁶ = 868190500027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868190500061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10587688985 + ... + 10587689066.

It is an arithmetic number, because the mean of its divisors is an integer number (222341469546).

Almost surely, 2^868190500091 is an apocalyptic number.

868190500091 is a deficient number, since it is larger than the sum of its proper divisors (21175378093).

868190500091 is a wasteful number, since it uses less digits than its factorization.

868190500091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21175378092.

The product of its (nonzero) digits is 155520, while the sum is 47.

The spelling of 868190500091 in words is "eight hundred sixty-eight billion, one hundred ninety million, five hundred thousand, ninety-one".