91020384000 has 1728 divisors, whose sum is σ = 423410577408. Its totient is φ = 18247680000.

The previous prime is 91020383963. The next prime is 91020384001. The reversal of 91020384000 is 48302019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91020384001) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 602783925 + ... + 602784075.

Almost surely, 2^91020384000 is an apocalyptic number.

91020384000 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 91020384000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211705288704).

91020384000 is an abundant number, since it is smaller than the sum of its proper divisors (332390193408).

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

91020384000 is a wasteful number, since it uses less digits than its factorization.

91020384000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 91020384000 its reverse (48302019), we get a palindrome (91068686019).

The spelling of 91020384000 in words is "ninety-one billion, twenty million, three hundred eighty-four thousand".