191068864 has 56 divisors (see below), whose sum is σ = 456143360. Its totient is φ = 77573376.

The previous prime is 191068861. The next prime is 191068879. The reversal of 191068864 is 468860191.

191068864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 191068864.

It is not an unprimeable number, because it can be changed into a prime (191068861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712 + ... + 19735.

Almost surely, 2^191068864 is an apocalyptic number.

191068864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

191068864 is an abundant number, since it is smaller than the sum of its proper divisors (265074496).

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

191068864 is a wasteful number, since it uses less digits than its factorization.

191068864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22485 (or 22475 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 191068864 is about 13822.7661486404. The cubic root of 191068864 is about 575.9657258413.

The spelling of 191068864 in words is "one hundred ninety-one million, sixty-eight thousand, eight hundred sixty-four".