261318870444 has 12 divisors (see below), whose sum is σ = 609744031064. Its totient is φ = 87106290144.

The previous prime is 261318870413. The next prime is 261318870451. The reversal of 261318870444 is 444078813162.

261318870444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 261318870393 and 261318870402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10888286257 + ... + 10888286280.

Almost surely, 2^261318870444 is an apocalyptic number.

It is an amenable number.

261318870444 is an abundant number, since it is smaller than the sum of its proper divisors (348425160620).

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

261318870444 is a wasteful number, since it uses less digits than its factorization.

261318870444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21776572544 (or 21776572542 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 261318870444 in words is "two hundred sixty-one billion, three hundred eighteen million, eight hundred seventy thousand, four hundred forty-four".