2015512542120 has 512 divisors, whose sum is σ = 8030969856000. Its totient is φ = 391982146560.

The previous prime is 2015512542067. The next prime is 2015512542161. The reversal of 2015512542120 is 212452155102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14502321 + ... + 14640639.

It is an arithmetic number, because the mean of its divisors is an integer number (15685488000).

Almost surely, 2^{2015512542120} is an apocalyptic number.

2015512542120 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 2015512542120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4015484928000).

2015512542120 is an abundant number, since it is smaller than the sum of its proper divisors (6015457313880).

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

2015512542120 is a wasteful number, since it uses less digits than its factorization.

2015512542120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138453 (or 138449 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 2015512542120 its reverse (212452155102), we get a palindrome (2227964697222).

The spelling of 2015512542120 in words is "two trillion, fifteen billion, five hundred twelve million, five hundred forty-two thousand, one hundred twenty".