91068564 has 12 divisors (see below), whose sum is σ = 212493344. Its totient is φ = 30356184.

The previous prime is 91068559. The next prime is 91068587. The reversal of 91068564 is 46586019.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3794512 + ... + 3794535.

Almost surely, 2^91068564 is an apocalyptic number.

It is an amenable number.

91068564 is an abundant number, since it is smaller than the sum of its proper divisors (121424780).

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

91068564 is a wasteful number, since it uses less digits than its factorization.

91068564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7589054 (or 7589052 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 91068564 is about 9542.9850675771. The cubic root of 91068564 is about 449.9070820498.

The spelling of 91068564 in words is "ninety-one million, sixty-eight thousand, five hundred sixty-four".