91567565 has 8 divisors (see below), whose sum is σ = 110059008. Its totient is φ = 73135440.

The previous prime is 91567549. The next prime is 91567571. The reversal of 91567565 is 56576519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91567565 - 2⁴ = 91567549 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 11357 + ... + 17666.

It is an arithmetic number, because the mean of its divisors is an integer number (13757376).

Almost surely, 2^91567565 is an apocalyptic number.

It is an amenable number.

91567565 is a deficient number, since it is larger than the sum of its proper divisors (18491443).

91567565 is a wasteful number, since it uses less digits than its factorization.

91567565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29659.

The product of its digits is 283500, while the sum is 44.

The square root of 91567565 is about 9569.0942622591. The cubic root of 91567565 is about 450.7273258622.

The spelling of 91567565 in words is "ninety-one million, five hundred sixty-seven thousand, five hundred sixty-five".