91552024440 has 256 divisors, whose sum is σ = 316074960000. Its totient is φ = 23543783424.

The previous prime is 91552024439. The next prime is 91552024477. The reversal of 91552024440 is 4442025519.

It is a happy number.

91552024440 is a `hidden beast` number, since 9 + 1 + 5 + 5 + 202 + 4 + 440 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 91552024395 and 91552024404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43001296 + ... + 43003424.

Almost surely, 2^91552024440 is an apocalyptic number.

91552024440 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 91552024440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158037480000).

91552024440 is an abundant number, since it is smaller than the sum of its proper divisors (224522935560).

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

91552024440 is a wasteful number, since it uses less digits than its factorization.

91552024440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551 (or 3541 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 91552024440 its reverse (4442025519), we get a palindrome (95994049959).

The spelling of 91552024440 in words is "ninety-one billion, five hundred fifty-two million, twenty-four thousand, four hundred forty".