261105260524 has 24 divisors (see below), whose sum is σ = 483894900720. Its totient is φ = 122852184576.

The previous prime is 261105260503. The next prime is 261105260531. The reversal of 261105260524 is 425062501162.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 261105260524.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80584 + ... + 727120.

It is an arithmetic number, because the mean of its divisors is an integer number (20162287530).

Almost surely, 2^261105260524 is an apocalyptic number.

It is an amenable number.

261105260524 is a deficient number, since it is larger than the sum of its proper divisors (222789640196).

261105260524 is a wasteful number, since it uses less digits than its factorization.

261105260524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652497 (or 652495 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 261105260524 its reverse (425062501162), we get a palindrome (686167761686).

The spelling of 261105260524 in words is "two hundred sixty-one billion, one hundred five million, two hundred sixty thousand, five hundred twenty-four".