91616015 has 32 divisors (see below), whose sum is σ = 119218176. Its totient is φ = 67415040.

The previous prime is 91616011. The next prime is 91616023. The reversal of 91616015 is 51061619.

It is not a de Polignac number, because 91616015 - 2² = 91616011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91616011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479570 + ... + 479760.

It is an arithmetic number, because the mean of its divisors is an integer number (3725568).

Almost surely, 2^91616015 is an apocalyptic number.

91616015 is a deficient number, since it is larger than the sum of its proper divisors (27602161).

91616015 is a wasteful number, since it uses less digits than its factorization.

91616015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 91616015 is about 9571.6255150314. The cubic root of 91616015 is about 450.8068077490.

The spelling of 91616015 in words is "ninety-one million, six hundred sixteen thousand, fifteen".