91807927249920 has 1408 divisors, whose sum is σ = 354045879386112. Its totient is φ = 19865154355200.

The previous prime is 91807927249873. The next prime is 91807927249937. The reversal of 91807927249920 is 2994272970819.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 30901354035 + ... + 30901357005.

Almost surely, 2^{91807927249920} 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 91807927249920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177022939693056).

91807927249920 is an abundant number, since it is smaller than the sum of its proper divisors (262237952136192).

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

91807927249920 is a wasteful number, since it uses less digits than its factorization.

91807927249920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 69.

The spelling of 91807927249920 in words is "ninety-one trillion, eight hundred seven billion, nine hundred twenty-seven million, two hundred forty-nine thousand, nine hundred twenty".