91543648 has 24 divisors (see below), whose sum is σ = 205973712. Its totient is φ = 39232896.

The previous prime is 91543631. The next prime is 91543681. The reversal of 91543648 is 84634519.

It is a self number, because there is not a number n which added to its sum of digits gives 91543648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204115 + ... + 204562.

It is an arithmetic number, because the mean of its divisors is an integer number (8582238).

Almost surely, 2^91543648 is an apocalyptic number.

It is an amenable number.

91543648 is an abundant number, since it is smaller than the sum of its proper divisors (114430064).

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

91543648 is a wasteful number, since it uses less digits than its factorization.

91543648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408694 (or 408686 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 91543648 is about 9567.8444803414. The cubic root of 91543648 is about 450.6880798543.

The spelling of 91543648 in words is "ninety-one million, five hundred forty-three thousand, six hundred forty-eight".