261452730250 has 72 divisors (see below), whose sum is σ = 497358706572. Its totient is φ = 102915633600.

The previous prime is 261452730229. The next prime is 261452730263. The reversal of 261452730250 is 52037254162.

It can be written as a sum of positive squares in 6 ways, for example, as 15717386161 + 245735344089 = 125369^2 + 495717^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 590186529 + ... + 590186971.

Almost surely, 2^261452730250 is an apocalyptic number.

261452730250 is a deficient number, since it is larger than the sum of its proper divisors (235905976322).

261452730250 is an frugal number, since it uses more digits than its factorization.

261452730250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 261452730250 in words is "two hundred sixty-one billion, four hundred fifty-two million, seven hundred thirty thousand, two hundred fifty".