618136631816 has 32 divisors (see below), whose sum is σ = 1264633948800. Its totient is φ = 280912626240.

The previous prime is 618136631747. The next prime is 618136631911.

618136631816 is nontrivially palindromic in base 10.

618136631816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306176 + ... + 1153263.

It is an arithmetic number, because the mean of its divisors is an integer number (39519810900).

Almost surely, 2^618136631816 is an apocalyptic number.

It is an amenable number.

618136631816 is an abundant number, since it is smaller than the sum of its proper divisors (646497316984).

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

618136631816 is a wasteful number, since it uses less digits than its factorization.

618136631816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464269 (or 1464265 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The spelling of 618136631816 in words is "six hundred eighteen billion, one hundred thirty-six million, six hundred thirty-one thousand, eight hundred sixteen".