618573231808 has 56 divisors (see below), whose sum is σ = 1408961876000. Its totient is φ = 263945115648.

The previous prime is 618573231803. The next prime is 618573231827. The reversal of 618573231808 is 808132375816.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (618573231803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2912133 + ... + 3117316.

It is an arithmetic number, because the mean of its divisors is an integer number (25160033500).

Almost surely, 2^618573231808 is an apocalyptic number.

It is an amenable number.

618573231808 is an abundant number, since it is smaller than the sum of its proper divisors (790388644192).

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

618573231808 is a wasteful number, since it uses less digits than its factorization.

618573231808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6029697 (or 6029687 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 618573231808 in words is "six hundred eighteen billion, five hundred seventy-three million, two hundred thirty-one thousand, eight hundred eight".