261210610632 has 64 divisors (see below), whose sum is σ = 656847360000. Its totient is φ = 86562146880.

The previous prime is 261210610627. The next prime is 261210610651. The reversal of 261210610632 is 236016012162.

It is a super-2 number, since 2×261210610632² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261210610632.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2994369 + ... + 3080367.

It is an arithmetic number, because the mean of its divisors is an integer number (10263240000).

Almost surely, 2^261210610632 is an apocalyptic number.

It is an amenable number.

261210610632 is an abundant number, since it is smaller than the sum of its proper divisors (395636749368).

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

261210610632 is a wasteful number, since it uses less digits than its factorization.

261210610632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86746 (or 86742 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 261210610632 its reverse (236016012162), we get a palindrome (497226622794).

The spelling of 261210610632 in words is "two hundred sixty-one billion, two hundred ten million, six hundred ten thousand, six hundred thirty-two".