91983617274480 has 160 divisors (see below), whose sum is σ = 286907360753664. Its totient is φ = 24377778044928.

The previous prime is 91983617274433. The next prime is 91983617274541. The reversal of 91983617274480 is 8447271638919.

91983617274480 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 9590809²-1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229979632 + ... + 230379248.

Almost surely, 2^{91983617274480} 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 91983617274480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143453680376832).

91983617274480 is an abundant number, since it is smaller than the sum of its proper divisors (194923743479184).

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

91983617274480 is a wasteful number, since it uses less digits than its factorization.

91983617274480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405543 (or 405537 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 69.

The spelling of 91983617274480 in words is "ninety-one trillion, nine hundred eighty-three billion, six hundred seventeen million, two hundred seventy-four thousand, four hundred eighty".