204260668487 has 4 divisors (see below), whose sum is σ = 205401789720. Its totient is φ = 203119547256.

The previous prime is 204260668471. The next prime is 204260668523. The reversal of 204260668487 is 784866062402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204260668487 - 2⁴ = 204260668471 is a prime.

It is a super-2 number, since 2×204260668487² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204260668427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570560348 + ... + 570560705.

It is an arithmetic number, because the mean of its divisors is an integer number (51350447430).

Almost surely, 2^204260668487 is an apocalyptic number.

204260668487 is a deficient number, since it is larger than the sum of its proper divisors (1141121233).

204260668487 is a wasteful number, since it uses less digits than its factorization.

204260668487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141121232.

The product of its (nonzero) digits is 6193152, while the sum is 53.

The spelling of 204260668487 in words is "two hundred four billion, two hundred sixty million, six hundred sixty-eight thousand, four hundred eighty-seven".