91490031360 has 720 divisors, whose sum is σ = 402956089536. Its totient is φ = 19301400576.

The previous prime is 91490031349. The next prime is 91490031389. The reversal of 91490031360 is 6313009419.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9430032 + ... + 9439728.

Almost surely, 2^91490031360 is an apocalyptic number.

91490031360 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91490031360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201478044768).

91490031360 is an abundant number, since it is smaller than the sum of its proper divisors (311466058176).

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

91490031360 is a wasteful number, since it uses less digits than its factorization.

91490031360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9750 (or 9727 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The spelling of 91490031360 in words is "ninety-one billion, four hundred ninety million, thirty-one thousand, three hundred sixty".