2163526217449 has 9 divisors (see below), whose sum is σ = 2199666520389. Its totient is φ = 2127970320960.

The previous prime is 2163526217443. The next prime is 2163526217459. The reversal of 2163526217449 is 9447126253612.

The square root of 2163526217449 is 1470893.

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

It can be written as a sum of positive squares in 4 ways, for example, as 382016705625 + 1781509511824 = 618075^2 + 1334732^2 .

It is not a de Polignac number, because 2163526217449 - 2²⁹ = 2162989346537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2163526217396 and 2163526217405.

It is not an unprimeable number, because it can be changed into a prime (2163526217443) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 89712417 + ... + 89736529.

Almost surely, 2^{2163526217449} is an apocalyptic number.

2163526217449 is the 1470893-rd square number.

2163526217449 is the 735447-th centered octagonal number.

It is an amenable number.

2163526217449 is a deficient number, since it is larger than the sum of its proper divisors (36140302940).

2163526217449 is an frugal number, since it uses more digits than its factorization.

2163526217449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48348 (or 24174 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The spelling of 2163526217449 in words is "two trillion, one hundred sixty-three billion, five hundred twenty-six million, two hundred seventeen thousand, four hundred forty-nine".