12015007601520 has 320 divisors, whose sum is σ = 46486850651136. Its totient is φ = 2493956874240.

The previous prime is 12015007601473. The next prime is 12015007601557. The reversal of 12015007601520 is 2510670051021.

12015007601520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 16968822 + ... + 17662698.

Almost surely, 2^{12015007601520} is an apocalyptic number.

12015007601520 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 12015007601520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23243425325568).

12015007601520 is an abundant number, since it is smaller than the sum of its proper divisors (34471843049616).

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

12015007601520 is a wasteful number, since it uses less digits than its factorization.

12015007601520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694848 (or 694842 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

Adding to 12015007601520 its reverse (2510670051021), we get a palindrome (14525677652541).

The spelling of 12015007601520 in words is "twelve trillion, fifteen billion, seven million, six hundred one thousand, five hundred twenty".