204106665544 has 32 divisors (see below), whose sum is σ = 386262459000. Its totient is φ = 101103593472.

The previous prime is 204106665523. The next prime is 204106665583. The reversal of 204106665544 is 445566601402.

It can be written as a sum of positive squares in 4 ways, for example, as 157553424900 + 46553240644 = 396930^2 + 215762^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204106665544.

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, 10968312 + ... + 10986904.

Almost surely, 2^204106665544 is an apocalyptic number.

It is an amenable number.

204106665544 is a deficient number, since it is larger than the sum of its proper divisors (182155793456).

204106665544 is a wasteful number, since it uses less digits than its factorization.

204106665544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31297 (or 31293 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 204106665544 in words is "two hundred four billion, one hundred six million, six hundred sixty-five thousand, five hundred forty-four".