618991836912 has 60 divisors (see below), whose sum is σ = 1732414223800. Its totient is φ = 206319083904.

The previous prime is 618991836887. The next prime is 618991836917. The reversal of 618991836912 is 219638199816.

618991836912 is a `hidden beast` number, since 6 + 189 + 91 + 8 + 369 + 1 + 2 = 666.

618991836912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 618991836912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618991836917) 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, 2694339 + ... + 2915037.

Almost surely, 2^618991836912 is an apocalyptic number.

It is an amenable number.

618991836912 is an abundant number, since it is smaller than the sum of its proper divisors (1113422386888).

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

618991836912 is a wasteful number, since it uses less digits than its factorization.

618991836912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240190 (or 240181 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 618991836912 in words is "six hundred eighteen billion, nine hundred ninety-one million, eight hundred thirty-six thousand, nine hundred twelve".