15449907648 has 224 divisors, whose sum is σ = 47443461120. Its totient is φ = 4346265600.

The previous prime is 15449907617. The next prime is 15449907659. The reversal of 15449907648 is 84670994451.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38528248 + ... + 38528648.

Almost surely, 2^15449907648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15449907648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23721730560).

15449907648 is an abundant number, since it is smaller than the sum of its proper divisors (31993553472).

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

15449907648 is a wasteful number, since it uses less digits than its factorization.

15449907648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 15449907648 in words is "fifteen billion, four hundred forty-nine million, nine hundred seven thousand, six hundred forty-eight".