68568591 has 48 divisors (see below), whose sum is σ = 116865504. Its totient is φ = 35433216.

The previous prime is 68568583. The next prime is 68568593. The reversal of 68568591 is 19586586.

It is not a de Polignac number, because 68568591 - 2³ = 68568583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68568591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68568593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100945 + ... + 101621.

It is an arithmetic number, because the mean of its divisors is an integer number (2434698).

Almost surely, 2^68568591 is an apocalyptic number.

68568591 is a deficient number, since it is larger than the sum of its proper divisors (48296913).

68568591 is a wasteful number, since it uses less digits than its factorization.

68568591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 753 counting only the distinct ones).

The product of its digits is 518400, while the sum is 48.

The square root of 68568591 is about 8280.6153756831. The cubic root of 68568591 is about 409.2999972999.

The spelling of 68568591 in words is "sixty-eight million, five hundred sixty-eight thousand, five hundred ninety-one".