261321033234 has 16 divisors (see below), whose sum is σ = 522881946720. Its totient is φ = 87067031040.

The previous prime is 261321033203. The next prime is 261321033257. The reversal of 261321033234 is 432330123162.

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, 9980847 + ... + 10006994.

It is an arithmetic number, because the mean of its divisors is an integer number (32680121670).

Almost surely, 2^261321033234 is an apocalyptic number.

261321033234 is an abundant number, since it is smaller than the sum of its proper divisors (261560913486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261321033234 is a wasteful number, since it uses less digits than its factorization.

261321033234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19990025.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 261321033234 its reverse (432330123162), we get a palindrome (693651156396).

The spelling of 261321033234 in words is "two hundred sixty-one billion, three hundred twenty-one million, thirty-three thousand, two hundred thirty-four".