261564205230214 has 64 divisors (see below), whose sum is σ = 415852369632000. Its totient is φ = 123186125590528.

The previous prime is 261564205230187. The next prime is 261564205230281. The reversal of 261564205230214 is 412032502465162.

It is a super-3 number, since 3×261564205230214³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2452793304 + ... + 2452899940.

It is an arithmetic number, because the mean of its divisors is an integer number (6497693275500).

Almost surely, 2^{261564205230214} is an apocalyptic number.

261564205230214 is a deficient number, since it is larger than the sum of its proper divisors (154288164401786).

261564205230214 is a wasteful number, since it uses less digits than its factorization.

261564205230214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109617.

The product of its (nonzero) digits is 691200, while the sum is 43.

Adding to 261564205230214 its reverse (412032502465162), we get a palindrome (673596707695376).

The spelling of 261564205230214 in words is "two hundred sixty-one trillion, five hundred sixty-four billion, two hundred five million, two hundred thirty thousand, two hundred fourteen".