91845645 has 24 divisors (see below), whose sum is σ = 156113184. Its totient is φ = 46100736.

The previous prime is 91845641. The next prime is 91845659. The reversal of 91845645 is 54654819.

It is not a de Polignac number, because 91845645 - 2² = 91845641 is a prime.

It is a super-3 number, since 3×91845645³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91845597 and 91845606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91845641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6259 + ... + 14928.

It is an arithmetic number, because the mean of its divisors is an integer number (6504716).

Almost surely, 2^91845645 is an apocalyptic number.

It is an amenable number.

91845645 is a deficient number, since it is larger than the sum of its proper divisors (64267539).

91845645 is a wasteful number, since it uses less digits than its factorization.

91845645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21229 (or 21212 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 91845645 is about 9583.6133582277. The cubic root of 91845645 is about 451.1831335098.

The spelling of 91845645 in words is "ninety-one million, eight hundred forty-five thousand, six hundred forty-five".