868191368520 has 64 divisors (see below), whose sum is σ = 2976656123520. Its totient is φ = 198443741184.

The previous prime is 868191368491. The next prime is 868191368531. The reversal of 868191368520 is 25863191868.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516779737 + ... + 516781416.

It is an arithmetic number, because the mean of its divisors is an integer number (46510251930).

Almost surely, 2^868191368520 is an apocalyptic number.

It is an amenable number.

868191368520 is an abundant number, since it is smaller than the sum of its proper divisors (2108464755000).

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

868191368520 is a wasteful number, since it uses less digits than its factorization.

868191368520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033561174 (or 1033561170 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 868191368520 in words is "eight hundred sixty-eight billion, one hundred ninety-one million, three hundred sixty-eight thousand, five hundred twenty".