91680255 has 48 divisors (see below), whose sum is σ = 167635104. Its totient is φ = 48055680.

The previous prime is 91680217. The next prime is 91680271. The reversal of 91680255 is 55208619.

It is a happy number.

It is not a de Polignac number, because 91680255 - 2⁹ = 91679743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73497 + ... + 74733.

It is an arithmetic number, because the mean of its divisors is an integer number (3492398).

Almost surely, 2^91680255 is an apocalyptic number.

91680255 is a deficient number, since it is larger than the sum of its proper divisors (75954849).

91680255 is a wasteful number, since it uses less digits than its factorization.

91680255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 91680255 is about 9574.9806788317. The cubic root of 91680255 is about 450.9121498234.

The spelling of 91680255 in words is "ninety-one million, six hundred eighty thousand, two hundred fifty-five".