2015135880 has 64 divisors (see below), whose sum is σ = 6071889600. Its totient is φ = 535015680.

The previous prime is 2015135867. The next prime is 2015135891. The reversal of 2015135880 is 885315102.

It is a happy number.

It is a super-2 number, since 2×2015135880² = 8121545229726748800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9186 + ... + 64145.

It is an arithmetic number, because the mean of its divisors is an integer number (94873275).

Almost surely, 2^2015135880 is an apocalyptic number.

2015135880 is a gapful number since it is divisible by the number (20) 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 2015135880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3035944800).

2015135880 is an abundant number, since it is smaller than the sum of its proper divisors (4056753720).

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

2015135880 is a wasteful number, since it uses less digits than its factorization.

2015135880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73574 (or 73570 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 2015135880 is about 44890.2648689000. The cubic root of 2015135880 is about 1263.0914012549.

The spelling of 2015135880 in words is "two billion, fifteen million, one hundred thirty-five thousand, eight hundred eighty".