91141565 has 16 divisors (see below), whose sum is σ = 112504896. Its totient is φ = 70838400.

The previous prime is 91141559. The next prime is 91141591. The reversal of 91141565 is 56514119.

It is a de Polignac number, because none of the positive numbers 2^k-91141565 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 15 ways as a sum of consecutive naturals, for example, 57230 + ... + 58800.

It is an arithmetic number, because the mean of its divisors is an integer number (7031556).

Almost surely, 2^91141565 is an apocalyptic number.

It is an amenable number.

91141565 is a deficient number, since it is larger than the sum of its proper divisors (21363331).

91141565 is a wasteful number, since it uses less digits than its factorization.

91141565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900.

The product of its digits is 5400, while the sum is 32.

The square root of 91141565 is about 9546.8091528007. The cubic root of 91141565 is about 450.0272658376.

The spelling of 91141565 in words is "ninety-one million, one hundred forty-one thousand, five hundred sixty-five".