91619965448 has 32 divisors (see below), whose sum is σ = 188487768960. Its totient is φ = 41404706880.

The previous prime is 91619965447. The next prime is 91619965487. The reversal of 91619965448 is 84456991619.

It is not an unprimeable number, because it can be changed into a prime (91619965447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2993840 + ... + 3024287.

It is an arithmetic number, because the mean of its divisors is an integer number (5890242780).

Almost surely, 2^91619965448 is an apocalyptic number.

It is an amenable number.

91619965448 is an abundant number, since it is smaller than the sum of its proper divisors (96867803512).

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

91619965448 is a wasteful number, since it uses less digits than its factorization.

91619965448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6018317 (or 6018313 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 62.

The spelling of 91619965448 in words is "ninety-one billion, six hundred nineteen million, nine hundred sixty-five thousand, four hundred forty-eight".