2159518248609 has 4 divisors (see below), whose sum is σ = 2879357664816. Its totient is φ = 1439678832404.

The previous prime is 2159518248551. The next prime is 2159518248653. The reversal of 2159518248609 is 9068428159512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2159518248609 - 2¹⁶ = 2159518183073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159518248709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359919708099 + ... + 359919708104.

It is an arithmetic number, because the mean of its divisors is an integer number (719839416204).

Almost surely, 2^{2159518248609} is an apocalyptic number.

It is an amenable number.

2159518248609 is a deficient number, since it is larger than the sum of its proper divisors (719839416207).

2159518248609 is an equidigital number, since it uses as much as digits as its factorization.

2159518248609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719839416206.

The product of its (nonzero) digits is 12441600, while the sum is 60.

The spelling of 2159518248609 in words is "two trillion, one hundred fifty-nine billion, five hundred eighteen million, two hundred forty-eight thousand, six hundred nine".