204127996690 has 16 divisors (see below), whose sum is σ = 367515979992. Its totient is φ = 81632179584.

The previous prime is 204127996669. The next prime is 204127996781. The reversal of 204127996690 is 96699721402.

204127996690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 193627280961 + 10500715729 = 440031^2 + 102473^2 .

It is a super-2 number, since 2×204127996690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2332269 + ... + 2418208.

Almost surely, 2^204127996690 is an apocalyptic number.

204127996690 is a deficient number, since it is larger than the sum of its proper divisors (163387983302).

204127996690 is a wasteful number, since it uses less digits than its factorization.

204127996690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754781.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 204127996690 in words is "two hundred four billion, one hundred twenty-seven million, nine hundred ninety-six thousand, six hundred ninety".