11515102080 has 128 divisors (see below), whose sum is σ = 36973147680. Its totient is φ = 3048210432.

The previous prime is 11515102073. The next prime is 11515102111. The reversal of 11515102080 is 8020151511.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11515102080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241152 + ... + 284928.

Almost surely, 2^11515102080 is an apocalyptic number.

11515102080 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 11515102080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18486573840).

11515102080 is an abundant number, since it is smaller than the sum of its proper divisors (25458045600).

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

11515102080 is a wasteful number, since it uses less digits than its factorization.

11515102080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43936 (or 43924 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 24.

Adding to 11515102080 its reverse (8020151511), we get a palindrome (19535253591).

The spelling of 11515102080 in words is "eleven billion, five hundred fifteen million, one hundred two thousand, eighty".