91447099392 has 342 divisors, whose sum is σ = 276968239212. Its totient is φ = 26817331200.

The previous prime is 91447099327. The next prime is 91447099409. The reversal of 91447099392 is 29399074419.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2949906417 + ... + 2949906447.

Almost surely, 2^91447099392 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 91447099392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138484119606).

91447099392 is an abundant number, since it is smaller than the sum of its proper divisors (185521139820).

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

91447099392 is an frugal number, since it uses more digits than its factorization.

91447099392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 57.

The spelling of 91447099392 in words is "ninety-one billion, four hundred forty-seven million, ninety-nine thousand, three hundred ninety-two".