15120000000 has 704 divisors, whose sum is σ = 63968586240. Its totient is φ = 3456000000.

The previous prime is 15119999897. The next prime is 15120000023. The reversal of 15120000000 is 2151.

It is a happy number.

It is a super-2 number, since 2×15120000000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2159999997 + ... + 2160000003.

Almost surely, 2^15120000000 is an apocalyptic number.

15120000000 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 15120000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31984293120).

15120000000 is an abundant number, since it is smaller than the sum of its proper divisors (48848586240).

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

15120000000 is an frugal number, since it uses more digits than its factorization.

15120000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

Adding to 15120000000 its reverse (2151), we get a palindrome (15120002151).

The spelling of 15120000000 in words is "fifteen billion, one hundred twenty million", and thus it is an aban number.