15440664960 has 512 divisors, whose sum is σ = 63134899200. Its totient is φ = 3493380096.

The previous prime is 15440664959. The next prime is 15440664979. The reversal of 15440664960 is 6946604451.

It is a happy number.

15440664960 is a `hidden beast` number, since 1 + 544 + 0 + 6 + 6 + 49 + 60 = 666.

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

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, 12942124 + ... + 12943316.

It is an arithmetic number, because the mean of its divisors is an integer number (123310350).

Almost surely, 2^15440664960 is an apocalyptic number.

15440664960 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 15440664960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31567449600).

15440664960 is an abundant number, since it is smaller than the sum of its proper divisors (47694234240).

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

15440664960 is a wasteful number, since it uses less digits than its factorization.

15440664960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 15440664960 in words is "fifteen billion, four hundred forty million, six hundred sixty-four thousand, nine hundred sixty".