261360202756 has 9 divisors (see below), whose sum is σ = 457382144149. Its totient is φ = 130679590144.

The previous prime is 261360202739. The next prime is 261360202757. The reversal of 261360202756 is 657202063162.

The square root of 261360202756 is 511234.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 261341798656 = 4290^2 + 511216^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261360202757) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 894660 + ... + 1150276.

Almost surely, 2^261360202756 is an apocalyptic number.

261360202756 is the 511234-th square number.

It is an amenable number.

261360202756 is a deficient number, since it is larger than the sum of its proper divisors (196021941393).

261360202756 is an frugal number, since it uses more digits than its factorization.

261360202756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511238 (or 255619 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 261360202756 in words is "two hundred sixty-one billion, three hundred sixty million, two hundred two thousand, seven hundred fifty-six".