36681821028 has 36 divisors (see below), whose sum is σ = 96157698000. Its totient is φ = 12227273352.

The previous prime is 36681821003. The next prime is 36681821123. The reversal of 36681821028 is 82012818663.

36681821028 is a `hidden beast` number, since 366 + 8 + 182 + 102 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18868278 + ... + 18870221.

Almost surely, 2^36681821028 is an apocalyptic number.

It is an amenable number.

36681821028 is an abundant number, since it is smaller than the sum of its proper divisors (59475876972).

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

36681821028 is a wasteful number, since it uses less digits than its factorization.

36681821028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37738518 (or 37738504 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 36681821028 in words is "thirty-six billion, six hundred eighty-one million, eight hundred twenty-one thousand, twenty-eight".