261342305300 has 18 divisors (see below), whose sum is σ = 567112802718. Its totient is φ = 104536922080.

The previous prime is 261342305293. The next prime is 261342305309. The reversal of 261342305300 is 3503243162.

261342305300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 276490384 + 261065814916 = 16628^2 + 510946^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261342305309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1306711427 + ... + 1306711626.

Almost surely, 2^261342305300 is an apocalyptic number.

261342305300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261342305300 is an abundant number, since it is smaller than the sum of its proper divisors (305770497418).

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

261342305300 is a wasteful number, since it uses less digits than its factorization.

261342305300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613423067 (or 2613423060 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 261342305300 its reverse (3503243162), we get a palindrome (264845548462).

The spelling of 261342305300 in words is "two hundred sixty-one billion, three hundred forty-two million, three hundred five thousand, three hundred".