91553493952880 has 160 divisors (see below), whose sum is σ = 218342953061376. Its totient is φ = 35682611069952.

The previous prime is 91553493952829. The next prime is 91553493952927. The reversal of 91553493952880 is 8825939435519.

It is a Cunningham number, because it is equal to 9568359²-1.

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, 8860296194 + ... + 8860306526.

Almost surely, 2^{91553493952880} 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 91553493952880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109171476530688).

91553493952880 is an abundant number, since it is smaller than the sum of its proper divisors (126789459108496).

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

91553493952880 is a wasteful number, since it uses less digits than its factorization.

91553493952880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16415 (or 16409 counting only the distinct ones).

The product of its (nonzero) digits is 419904000, while the sum is 71.

The spelling of 91553493952880 in words is "ninety-one trillion, five hundred fifty-three billion, four hundred ninety-three million, nine hundred fifty-two thousand, eight hundred eighty".