91612560 has 80 divisors (see below), whose sum is σ = 305855424. Its totient is φ = 22550016.

The previous prime is 91612559. The next prime is 91612561. The reversal of 91612560 is 6521619.

It is an interprime number because it is at equal distance from previous prime (91612559) and next prime (91612561).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×91612560² = 16785722299507200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91612561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11562 + ... + 17801.

Almost surely, 2^91612560 is an apocalyptic number.

It is an amenable number.

91612560 is an abundant number, since it is smaller than the sum of its proper divisors (214242864).

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

91612560 is a wasteful number, since it uses less digits than its factorization.

91612560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29392 (or 29386 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 91612560 is about 9571.4450319688. The cubic root of 91612560 is about 450.8011407736.

The spelling of 91612560 in words is "ninety-one million, six hundred twelve thousand, five hundred sixty".