91268550 has 72 divisors (see below), whose sum is σ = 247293696. Its totient is φ = 24131520.

The previous prime is 91268479. The next prime is 91268579. The reversal of 91268550 is 5586219.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 56352 + ... + 57948.

Almost surely, 2^91268550 is an apocalyptic number.

91268550 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 91268550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123646848).

91268550 is an abundant number, since it is smaller than the sum of its proper divisors (156025146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91268550 is a wasteful number, since it uses less digits than its factorization.

91268550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742 (or 1734 counting only the distinct ones).

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

The square root of 91268550 is about 9553.4574893072. The cubic root of 91268550 is about 450.2361723249.

The spelling of 91268550 in words is "ninety-one million, two hundred sixty-eight thousand, five hundred fifty".