36681856218 has 24 divisors (see below), whose sum is σ = 90831263328. Its totient is φ = 10480530312.

The previous prime is 36681856217. The next prime is 36681856231. The reversal of 36681856218 is 81265818663.

36681856218 is a `hidden beast` number, since 3 + 6 + 6 + 8 + 1 + 8 + 5 + 621 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (36681856217) 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, 145562796 + ... + 145563047.

It is an arithmetic number, because the mean of its divisors is an integer number (3784635972).

Almost surely, 2^36681856218 is an apocalyptic number.

36681856218 is an abundant number, since it is smaller than the sum of its proper divisors (54149407110).

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

36681856218 is a wasteful number, since it uses less digits than its factorization.

36681856218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291125858 (or 291125855 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 36681856218 in words is "thirty-six billion, six hundred eighty-one million, eight hundred fifty-six thousand, two hundred eighteen".