261303451444 has 48 divisors (see below), whose sum is σ = 545383415808. Its totient is φ = 107107485408.

The previous prime is 261303451397. The next prime is 261303451463. The reversal of 261303451444 is 444154303162.

261303451444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 11611027 + ... + 11633509.

It is an arithmetic number, because the mean of its divisors is an integer number (11362154496).

Almost surely, 2^261303451444 is an apocalyptic number.

It is an amenable number.

261303451444 is an abundant number, since it is smaller than the sum of its proper divisors (284079964364).

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

261303451444 is a wasteful number, since it uses less digits than its factorization.

261303451444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40564 (or 40562 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 261303451444 in words is "two hundred sixty-one billion, three hundred three million, four hundred fifty-one thousand, four hundred forty-four".