91390234580 has 48 divisors (see below), whose sum is σ = 205676392320. Its totient is φ = 34021646208.

The previous prime is 91390234577. The next prime is 91390234609. The reversal of 91390234580 is 8543209319.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2667770 + ... + 2701809.

It is an arithmetic number, because the mean of its divisors is an integer number (4284924840).

Almost surely, 2^91390234580 is an apocalyptic number.

It is an amenable number.

91390234580 is an abundant number, since it is smaller than the sum of its proper divisors (114286157740).

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

91390234580 is a wasteful number, since it uses less digits than its factorization.

91390234580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369648 (or 5369646 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 91390234580 in words is "ninety-one billion, three hundred ninety million, two hundred thirty-four thousand, five hundred eighty".