15612990328320 has 2560 divisors, whose sum is σ = 65964663705600. Its totient is φ = 3147359846400.

The previous prime is 15612990328297. The next prime is 15612990328321. The reversal of 15612990328320 is 2382309921651.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (2560).

It is a super-2 number, since 2×15612990328320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15612990328321) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 213876579804 + ... + 213876579876.

It is an arithmetic number, because the mean of its divisors is an integer number (25767446760).

Almost surely, 2^{15612990328320} is an apocalyptic number.

15612990328320 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 15612990328320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32982331852800).

15612990328320 is an abundant number, since it is smaller than the sum of its proper divisors (50351673377280).

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

15612990328320 is an frugal number, since it uses more digits than its factorization.

15612990328320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 15612990328320 in words is "fifteen trillion, six hundred twelve billion, nine hundred ninety million, three hundred twenty-eight thousand, three hundred twenty".