261444104450 has 12 divisors (see below), whose sum is σ = 486286034370. Its totient is φ = 104577641760.

The previous prime is 261444104447. The next prime is 261444104483. The reversal of 261444104450 is 54401444162.

It can be written as a sum of positive squares in 3 ways, for example, as 96894615841 + 164549488609 = 311279^2 + 405647^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 261444104450.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2614440995 + ... + 2614441094.

Almost surely, 2^261444104450 is an apocalyptic number.

261444104450 is a deficient number, since it is larger than the sum of its proper divisors (224841929920).

261444104450 is a wasteful number, since it uses less digits than its factorization.

261444104450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5228882101 (or 5228882096 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 35.

The spelling of 261444104450 in words is "two hundred sixty-one billion, four hundred forty-four million, one hundred four thousand, four hundred fifty".