91925888440 has 96 divisors (see below), whose sum is σ = 218844708480. Its totient is φ = 34715520000.

The previous prime is 91925888423. The next prime is 91925888473. The reversal of 91925888440 is 4488852919.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2062390 + ... + 2106490.

It is an arithmetic number, because the mean of its divisors is an integer number (2279632380).

Almost surely, 2^91925888440 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 91925888440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109422354240).

91925888440 is an abundant number, since it is smaller than the sum of its proper divisors (126918820040).

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

91925888440 is a wasteful number, since it uses less digits than its factorization.

91925888440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44225 (or 44180 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 58.

The spelling of 91925888440 in words is "ninety-one billion, nine hundred twenty-five million, eight hundred eighty-eight thousand, four hundred forty".