204661231273 has 16 divisors (see below), whose sum is σ = 217516104000. Its totient is φ = 192196573632.

The previous prime is 204661231259. The next prime is 204661231277. The reversal of 204661231273 is 372132166402.

It is a cyclic number.

It is not a de Polignac number, because 204661231273 - 2¹⁷ = 204661100201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204661231277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3207798 + ... + 3270976.

It is an arithmetic number, because the mean of its divisors is an integer number (13594756500).

Almost surely, 2^204661231273 is an apocalyptic number.

It is an amenable number.

204661231273 is a deficient number, since it is larger than the sum of its proper divisors (12854872727).

204661231273 is a wasteful number, since it uses less digits than its factorization.

204661231273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66264.

The product of its (nonzero) digits is 72576, while the sum is 37.

Adding to 204661231273 its reverse (372132166402), we get a palindrome (576793397675).

The spelling of 204661231273 in words is "two hundred four billion, six hundred sixty-one million, two hundred thirty-one thousand, two hundred seventy-three".