15115155120 has 640 divisors, whose sum is σ = 60546124800. Its totient is φ = 3433881600.

The previous prime is 15115155113. The next prime is 15115155151. The reversal of 15115155120 is 2155151151.

It is a happy number.

15115155120 is a `hidden beast` number, since 15 + 11 + 515 + 5 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21873975 + ... + 21874665.

It is an arithmetic number, because the mean of its divisors is an integer number (94603320).

Almost surely, 2^15115155120 is an apocalyptic number.

15115155120 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 15115155120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30273062400).

15115155120 is an abundant number, since it is smaller than the sum of its proper divisors (45430969680).

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

15115155120 is a wasteful number, since it uses less digits than its factorization.

15115155120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 27.

The spelling of 15115155120 in words is "fifteen billion, one hundred fifteen million, one hundred fifty-five thousand, one hundred twenty".