15349812720 has 640 divisors, whose sum is σ = 59241922560. Its totient is φ = 3238871040.

The previous prime is 15349812713. The next prime is 15349812787. The reversal of 15349812720 is 2721894351.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40077649 + ... + 40078031.

It is an arithmetic number, because the mean of its divisors is an integer number (92565504).

Almost surely, 2^15349812720 is an apocalyptic number.

15349812720 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 15349812720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29620961280).

15349812720 is an abundant number, since it is smaller than the sum of its proper divisors (43892109840).

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

15349812720 is a wasteful number, since it uses less digits than its factorization.

15349812720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 15349812720 in words is "fifteen billion, three hundred forty-nine million, eight hundred twelve thousand, seven hundred twenty".