91251085203 has 6 divisors (see below), whose sum is σ = 131807123084. Its totient is φ = 60834056796.

The previous prime is 91251085193. The next prime is 91251085231. The reversal of 91251085203 is 30258015219.

91251085203 is a `hidden beast` number, since 9 + 1 + 25 + 108 + 520 + 3 = 666.

It is not a de Polignac number, because 91251085203 - 2⁴ = 91251085187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91251075203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5069504725 + ... + 5069504742.

Almost surely, 2^91251085203 is an apocalyptic number.

91251085203 is a deficient number, since it is larger than the sum of its proper divisors (40556037881).

91251085203 is a wasteful number, since it uses less digits than its factorization.

91251085203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10139009473 (or 10139009470 counting only the distinct ones).

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

The spelling of 91251085203 in words is "ninety-one billion, two hundred fifty-one million, eighty-five thousand, two hundred three".