15221364480 has 432 divisors, whose sum is σ = 62425918464. Its totient is φ = 3478671360.

The previous prime is 15221364449. The next prime is 15221364491. The reversal of 15221364480 is 8446312251.

It is a happy number.

15221364480 is a `hidden beast` number, since 1 + 5 + 2 + 2 + 1 + 3 + 644 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2173785 + ... + 2180775.

Almost surely, 2^15221364480 is an apocalyptic number.

15221364480 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 15221364480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31212959232).

15221364480 is an abundant number, since it is smaller than the sum of its proper divisors (47204553984).

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

15221364480 is an frugal number, since it uses more digits than its factorization.

15221364480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034 (or 7008 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 15221364480 in words is "fifteen billion, two hundred twenty-one million, three hundred sixty-four thousand, four hundred eighty".