261440046452211 has 16 divisors (see below), whose sum is σ = 380345837640960. Its totient is φ = 158419593652320.

The previous prime is 261440046452203. The next prime is 261440046452239. The reversal of 261440046452211 is 112254640044162.

It is a happy number.

It is not a de Polignac number, because 261440046452211 - 2³ = 261440046452203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261440046452311) 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, 722800180 + ... + 723161793.

It is an arithmetic number, because the mean of its divisors is an integer number (23771614852560).

Almost surely, 2^{261440046452211} is an apocalyptic number.

261440046452211 is a deficient number, since it is larger than the sum of its proper divisors (118905791188749).

261440046452211 is a wasteful number, since it uses less digits than its factorization.

261440046452211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445967466.

The product of its (nonzero) digits is 368640, while the sum is 42.

Adding to 261440046452211 its reverse (112254640044162), we get a palindrome (373694686496373).

The spelling of 261440046452211 in words is "two hundred sixty-one trillion, four hundred forty billion, forty-six million, four hundred fifty-two thousand, two hundred eleven".