91555465 has 12 divisors (see below), whose sum is σ = 113790924. Its totient is φ = 70715456.

The previous prime is 91555463. The next prime is 91555469. The reversal of 91555465 is 56455519.

It can be written as a sum of positive squares in 6 ways, for example, as 5659641 + 85895824 = 2379^2 + 9268^2 .

It is not a de Polignac number, because 91555465 - 2¹ = 91555463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91555463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6682 + ... + 15091.

It is an arithmetic number, because the mean of its divisors is an integer number (9482577).

Almost surely, 2^91555465 is an apocalyptic number.

It is an amenable number.

91555465 is a deficient number, since it is larger than the sum of its proper divisors (22235459).

91555465 is a wasteful number, since it uses less digits than its factorization.

91555465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21836 (or 21807 counting only the distinct ones).

The product of its digits is 135000, while the sum is 40.

The square root of 91555465 is about 9568.4619976253. The cubic root of 91555465 is about 450.7074715216.

The spelling of 91555465 in words is "ninety-one million, five hundred fifty-five thousand, four hundred sixty-five".