201818646104 has 16 divisors (see below), whose sum is σ = 379021295400. Its totient is φ = 100746300672.

The previous prime is 201818646091. The next prime is 201818646137. The reversal of 201818646104 is 401646818102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20372537 + ... + 20382440.

Almost surely, 2^201818646104 is an apocalyptic number.

It is an amenable number.

201818646104 is a deficient number, since it is larger than the sum of its proper divisors (177202649296).

201818646104 is a wasteful number, since it uses less digits than its factorization.

201818646104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40755602 (or 40755598 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 201818646104 in words is "two hundred one billion, eight hundred eighteen million, six hundred forty-six thousand, one hundred four".