618555864489 has 16 divisors (see below), whose sum is σ = 826235001984. Its totient is φ = 411623856000.

The previous prime is 618555864469. The next prime is 618555864503. The reversal of 618555864489 is 984468555816.

It is not a de Polignac number, because 618555864489 - 2¹² = 618555860393 is a prime.

It is a super-2 number, since 2×618555864489² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (618555864469) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14570484 + ... + 14612874.

It is an arithmetic number, because the mean of its divisors is an integer number (51639687624).

Almost surely, 2^618555864489 is an apocalyptic number.

It is an amenable number.

618555864489 is a deficient number, since it is larger than the sum of its proper divisors (207679137495).

618555864489 is a wasteful number, since it uses less digits than its factorization.

618555864489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51088.

The product of its digits is 331776000, while the sum is 69.

The spelling of 618555864489 in words is "six hundred eighteen billion, five hundred fifty-five million, eight hundred sixty-four thousand, four hundred eighty-nine".