618506840718 has 24 divisors (see below), whose sum is σ = 1443182628888. Its totient is φ = 190309797072.

The previous prime is 618506840711. The next prime is 618506840747. The reversal of 618506840718 is 817048605816.

It is a happy number.

618506840718 is a `hidden beast` number, since 61 + 8 + 506 + 8 + 4 + 0 + 71 + 8 = 666.

It is a super-2 number, since 2×618506840718² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618506840711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1321595580 + ... + 1321596047.

It is an arithmetic number, because the mean of its divisors is an integer number (60132609537).

Almost surely, 2^618506840718 is an apocalyptic number.

618506840718 is an abundant number, since it is smaller than the sum of its proper divisors (824675788170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618506840718 is a wasteful number, since it uses less digits than its factorization.

618506840718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643191648 (or 2643191645 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 618506840718 in words is "six hundred eighteen billion, five hundred six million, eight hundred forty thousand, seven hundred eighteen".