261446005410 has 64 divisors (see below), whose sum is σ = 649154995200. Its totient is φ = 67319562240.

The previous prime is 261446005409. The next prime is 261446005493. The reversal of 261446005410 is 14500644162.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104514 + ... + 730626.

It is an arithmetic number, because the mean of its divisors is an integer number (10143046800).

Almost surely, 2^261446005410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261446005410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324577497600).

261446005410 is an abundant number, since it is smaller than the sum of its proper divisors (387708989790).

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

261446005410 is a wasteful number, since it uses less digits than its factorization.

261446005410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626603.

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 261446005410 its reverse (14500644162), we get a palindrome (275946649572).

The spelling of 261446005410 in words is "two hundred sixty-one billion, four hundred forty-six million, five thousand, four hundred ten".