11515051500 has 96 divisors (see below), whose sum is σ = 33556164096. Its totient is φ = 3068452800.

The previous prime is 11515051391. The next prime is 11515051501. The reversal of 11515051500 is 515051511.

It is a super-2 number, since 2×11515051500² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11515051501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3752967 + ... + 3756033.

It is an arithmetic number, because the mean of its divisors is an integer number (349543376).

Almost surely, 2^11515051500 is an apocalyptic number.

11515051500 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 11515051500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16778082048).

11515051500 is an abundant number, since it is smaller than the sum of its proper divisors (22041112596).

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

11515051500 is a wasteful number, since it uses less digits than its factorization.

11515051500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5592 (or 5580 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 24.

The spelling of 11515051500 in words is "eleven billion, five hundred fifteen million, fifty-one thousand, five hundred".