91651168 has 36 divisors (see below), whose sum is σ = 209901132. Its totient is φ = 39278400.

The previous prime is 91651141. The next prime is 91651169. The reversal of 91651168 is 86115619.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91651169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27658 + ... + 30793.

It is an arithmetic number, because the mean of its divisors is an integer number (5830587).

Almost surely, 2^91651168 is an apocalyptic number.

91651168 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

91651168 is an abundant number, since it is smaller than the sum of its proper divisors (118249964).

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

91651168 is a wasteful number, since it uses less digits than its factorization.

91651168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58475 (or 58460 counting only the distinct ones).

The product of its digits is 12960, while the sum is 37.

The square root of 91651168 is about 9573.4616518791. The cubic root of 91651168 is about 450.8644584603.

It can be divided in two parts, 91651 and 168, that added together give a palindrome (91819).

The spelling of 91651168 in words is "ninety-one million, six hundred fifty-one thousand, one hundred sixty-eight".