15399817216 has 117 divisors (see below), whose sum is σ = 35953567209. Its totient is φ = 6576095232.

The previous prime is 15399817211. The next prime is 15399817231. The reversal of 15399817216 is 61271899351.

The square root of 15399817216 is 124096.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2654310400 + 12745506816 = 51520^2 + 112896^2 .

It is not an unprimeable number, because it can be changed into a prime (15399817211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 55594870 + ... + 55595146.

Almost surely, 2^15399817216 is an apocalyptic number.

15399817216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15399817216 is the 124096-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15399817216

15399817216 is an abundant number, since it is smaller than the sum of its proper divisors (20553749993).

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

15399817216 is an frugal number, since it uses more digits than its factorization.

15399817216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 286 counting only the distinct ones).

The product of its digits is 816480, while the sum is 52.

The spelling of 15399817216 in words is "fifteen billion, three hundred ninety-nine million, eight hundred seventeen thousand, two hundred sixteen".