91411560 has 96 divisors (see below), whose sum is σ = 306708480. Its totient is φ = 23587200.

The previous prime is 91411493. The next prime is 91411561. The reversal of 91411560 is 6511419.

91411560 is a `hidden beast` number, since 91 + 4 + 11 + 560 = 666.

It is not an unprimeable number, because it can be changed into a prime (91411561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7065 + ... + 15255.

It is an arithmetic number, because the mean of its divisors is an integer number (3194880).

Almost surely, 2^91411560 is an apocalyptic number.

91411560 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91411560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153354240).

91411560 is an abundant number, since it is smaller than the sum of its proper divisors (215296920).

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

91411560 is a wasteful number, since it uses less digits than its factorization.

91411560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239 (or 8232 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 91411560 is about 9560.9392844009. The cubic root of 91411560 is about 450.4712101115.

Adding to 91411560 its reverse (6511419), we get a palindrome (97922979).

It can be divided in two parts, 9141 and 1560, that added together give a palindrome (10701).

The spelling of 91411560 in words is "ninety-one million, four hundred eleven thousand, five hundred sixty".