91615516 has 12 divisors (see below), whose sum is σ = 169758288. Its totient is φ = 43113152.

The previous prime is 91615493. The next prime is 91615519. The reversal of 91615516 is 61551619.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91615519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673576 + ... + 673711.

It is an arithmetic number, because the mean of its divisors is an integer number (14146524).

Almost surely, 2^91615516 is an apocalyptic number.

It is an amenable number.

91615516 is a deficient number, since it is larger than the sum of its proper divisors (78142772).

91615516 is a wasteful number, since it uses less digits than its factorization.

91615516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347308 (or 1347306 counting only the distinct ones).

The product of its digits is 8100, while the sum is 34.

The square root of 91615516 is about 9571.5994483681. The cubic root of 91615516 is about 450.8059892858.

The spelling of 91615516 in words is "ninety-one million, six hundred fifteen thousand, five hundred sixteen".