15221655552960 has 448 divisors, whose sum is σ = 55566259200000. Its totient is φ = 3918012715008.

The previous prime is 15221655552953. The next prime is 15221655552979. The reversal of 15221655552960 is 6925555612251.

15221655552960 is a `hidden beast` number, since 1 + 5 + 2 + 2 + 1 + 6 + 5 + 55 + 529 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 15221655552897 and 15221655552906.

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, 1202431111 + ... + 1202443769.

Almost surely, 2^{15221655552960} is an apocalyptic number.

15221655552960 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 15221655552960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27783129600000).

15221655552960 is an abundant number, since it is smaller than the sum of its proper divisors (40344603647040).

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

15221655552960 is a wasteful number, since it uses less digits than its factorization.

15221655552960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17513 (or 17497 counting only the distinct ones).

The product of its (nonzero) digits is 8100000, while the sum is 54.

The spelling of 15221655552960 in words is "fifteen trillion, two hundred twenty-one billion, six hundred fifty-five million, five hundred fifty-two thousand, nine hundred sixty".