2579615351618 has 18 divisors (see below), whose sum is σ = 3877880820723. Its totient is φ = 1286994554340.

The previous prime is 2579615351569. The next prime is 2579615351629. The reversal of 2579615351618 is 8161535169752.

It can be written as a sum of positive squares in only one way, i.e., 1289807675809 + 1289807675809 = 1135697^2 + 1135697^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1135697.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1378735223 + ... + 1378737093.

Almost surely, 2^{2579615351618} is an apocalyptic number.

2579615351618 is a deficient number, since it is larger than the sum of its proper divisors (1298265469105).

2579615351618 is an frugal number, since it uses more digits than its factorization.

2579615351618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958 (or 2480 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 59.

The spelling of 2579615351618 in words is "two trillion, five hundred seventy-nine billion, six hundred fifteen million, three hundred fifty-one thousand, six hundred eighteen".