11491408500 has 384 divisors, whose sum is σ = 39670525440. Its totient is φ = 2563392000.

The previous prime is 11491408499. The next prime is 11491408501. The reversal of 11491408500 is 580419411.

It is an interprime number because it is at equal distance from previous prime (11491408499) and next prime (11491408501).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11491408501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 36250342 + ... + 36250658.

It is an arithmetic number, because the mean of its divisors is an integer number (103308660).

Almost surely, 2^11491408500 is an apocalyptic number.

11491408500 is a gapful number since it is divisible by the number (10) 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 11491408500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19835262720).

11491408500 is an abundant number, since it is smaller than the sum of its proper divisors (28179116940).

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

11491408500 is a wasteful number, since it uses less digits than its factorization.

11491408500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 11491408500 in words is "eleven billion, four hundred ninety-one million, four hundred eight thousand, five hundred".