261525215224 has 64 divisors (see below), whose sum is σ = 605763748800. Its totient is φ = 103075835904.

The previous prime is 261525215197. The next prime is 261525215233. The reversal of 261525215224 is 422512525162.

It is a congruent number.

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, 471897 + ... + 863560.

It is an arithmetic number, because the mean of its divisors is an integer number (9465058575).

Almost surely, 2^261525215224 is an apocalyptic number.

It is an amenable number.

261525215224 is an abundant number, since it is smaller than the sum of its proper divisors (344238533576).

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

261525215224 is a wasteful number, since it uses less digits than its factorization.

261525215224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335752 (or 1335748 counting only the distinct ones).

The product of its digits is 96000, while the sum is 37.

The spelling of 261525215224 in words is "two hundred sixty-one billion, five hundred twenty-five million, two hundred fifteen thousand, two hundred twenty-four".