15990226560 has 768 divisors, whose sum is σ = 71122821120. Its totient is φ = 3212697600.

The previous prime is 15990226547. The next prime is 15990226597. The reversal of 15990226560 is 6562209951.

It is a happy number.

15990226560 is a `hidden beast` number, since 1 + 599 + 0 + 2 + 2 + 6 + 56 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13748539 + ... + 13749701.

It is an arithmetic number, because the mean of its divisors is an integer number (92607840).

Almost surely, 2^15990226560 is an apocalyptic number.

15990226560 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 15990226560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35561410560).

15990226560 is an abundant number, since it is smaller than the sum of its proper divisors (55132594560).

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

15990226560 is a wasteful number, since it uses less digits than its factorization.

15990226560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 15990226560 in words is "fifteen billion, nine hundred ninety million, two hundred twenty-six thousand, five hundred sixty".