91505648 has 40 divisors (see below), whose sum is σ = 191685648. Its totient is φ = 42066432.

The previous prime is 91505647. The next prime is 91505681. The reversal of 91505648 is 84650519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91505641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 63140 + ... + 64572.

Almost surely, 2^91505648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91505648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95842824).

91505648 is an abundant number, since it is smaller than the sum of its proper divisors (100180000).

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

91505648 is a wasteful number, since it uses less digits than its factorization.

91505648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 91505648 is about 9565.8584559882. The cubic root of 91505648 is about 450.6257106360.

The spelling of 91505648 in words is "ninety-one million, five hundred five thousand, six hundred forty-eight".