15782210218489 has 45 divisors (see below), whose sum is σ = 18801751347771. Its totient is φ = 13237615385280.

The previous prime is 15782210218487. The next prime is 15782210218493. The reversal of 15782210218489 is 98481201228751.

The square root of 15782210218489 is 3972683.

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

15782210218489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 7 ways, for example, as 11234261580025 + 4547948638464 = 3351755^2 + 2132592^2 .

It is not a de Polignac number, because 15782210218489 - 2¹ = 15782210218487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15782210218483) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 7385216629 + ... + 7385218765.

Almost surely, 2^{15782210218489} is an apocalyptic number.

15782210218489 is the 3972683-rd square number.

15782210218489 is the 1986342-nd centered octagonal number.

It is an amenable number.

15782210218489 is a deficient number, since it is larger than the sum of its proper divisors (3019541129282).

15782210218489 is an frugal number, since it uses more digits than its factorization.

15782210218489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 58.

The spelling of 15782210218489 in words is "fifteen trillion, seven hundred eighty-two billion, two hundred ten million, two hundred eighteen thousand, four hundred eighty-nine".