191797946564 has 12 divisors (see below), whose sum is σ = 383595893184. Its totient is φ = 82199119944.

The previous prime is 191797946551. The next prime is 191797946569. The reversal of 191797946564 is 465649797191.

191797946564 is an admirable number.

It is a hoax number, since the sum of its digits (68) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 191797946494 and 191797946503.

It is not an unprimeable number, because it can be changed into a prime (191797946569) 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, 3424963304 + ... + 3424963359.

It is an arithmetic number, because the mean of its divisors is an integer number (31966324432).

Almost surely, 2^191797946564 is an apocalyptic number.

191797946564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

191797946564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

191797946564 is a wasteful number, since it uses less digits than its factorization.

191797946564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6849926674 (or 6849926672 counting only the distinct ones).

The product of its digits is 102876480, while the sum is 68.

The spelling of 191797946564 in words is "one hundred ninety-one billion, seven hundred ninety-seven million, nine hundred forty-six thousand, five hundred sixty-four".