4518619397857 has 4 divisors (see below), whose sum is σ = 4521226796820. Its totient is φ = 4516011998896.

The previous prime is 4518619397779. The next prime is 4518619397879. The reversal of 4518619397857 is 7587939168154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 907540117201 + 3611079280656 = 952649^2 + 1900284^2 .

It is a cyclic number.

It is not a de Polignac number, because 4518619397857 - 2¹⁵ = 4518619365089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4518619397857.

It is not an unprimeable number, because it can be changed into a prime (4518619397657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1303696882 + ... + 1303700347.

It is an arithmetic number, because the mean of its divisors is an integer number (1130306699205).

Almost surely, 2^{4518619397857} is an apocalyptic number.

It is an amenable number.

4518619397857 is a deficient number, since it is larger than the sum of its proper divisors (2607398963).

4518619397857 is a wasteful number, since it uses less digits than its factorization.

4518619397857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607398962.

The product of its digits is 457228800, while the sum is 73.

The spelling of 4518619397857 in words is "four trillion, five hundred eighteen billion, six hundred nineteen million, three hundred ninety-seven thousand, eight hundred fifty-seven".