11581112490 has 64 divisors (see below), whose sum is σ = 29030282496. Its totient is φ = 2951258112.

The previous prime is 11581112449. The next prime is 11581112533. The reversal of 11581112490 is 9421118511.

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, 788292 + ... + 802848.

It is an arithmetic number, because the mean of its divisors is an integer number (453598164).

Almost surely, 2^11581112490 is an apocalyptic number.

11581112490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11581112490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14515141248).

11581112490 is an abundant number, since it is smaller than the sum of its proper divisors (17449170006).

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

11581112490 is a wasteful number, since it uses less digits than its factorization.

11581112490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15743.

The product of its (nonzero) digits is 2880, while the sum is 33.

The spelling of 11581112490 in words is "eleven billion, five hundred eighty-one million, one hundred twelve thousand, four hundred ninety".