191547663664 has 40 divisors (see below), whose sum is σ = 425178377120. Its totient is φ = 81891122688.

The previous prime is 191547663623. The next prime is 191547663701. The reversal of 191547663664 is 466366745191.

It is a junction number, because it is equal to n+sod(n) for n = 191547663599 and 191547663608.

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, 2044959 + ... + 2136574.

It is an arithmetic number, because the mean of its divisors is an integer number (10629459428).

Almost surely, 2^191547663664 is an apocalyptic number.

191547663664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

191547663664 is an abundant number, since it is smaller than the sum of its proper divisors (233630713456).

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

191547663664 is a wasteful number, since it uses less digits than its factorization.

191547663664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181957 (or 4181951 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 58.

The spelling of 191547663664 in words is "one hundred ninety-one billion, five hundred forty-seven million, six hundred sixty-three thousand, six hundred sixty-four".