204139828638001 has 3 divisors (see below), whose sum is σ = 204139842925753. Its totient is φ = 204139814350250.

The previous prime is 204139828637999. The next prime is 204139828638013. The reversal of 204139828638001 is 100836828931402.

The square root of 204139828638001 is 14287751.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 204139828638001 - 2¹ = 204139828637999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204139828638071) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7143876 + ... + 21431626.

Almost surely, 2^{204139828638001} is an apocalyptic number.

204139828638001 is the 14287751-st square number.

204139828638001 is the 7143876-th centered octagonal number.

It is an amenable number.

204139828638001 is a deficient number, since it is larger than the sum of its proper divisors (14287752).

204139828638001 is an frugal number, since it uses more digits than its factorization.

204139828638001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28575502 (or 14287751 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 204139828638001 in words is "two hundred four trillion, one hundred thirty-nine billion, eight hundred twenty-eight million, six hundred thirty-eight thousand, one".