261200722084 has 27 divisors (see below), whose sum is σ = 467119664193. Its totient is φ = 127798120368.

The previous prime is 261200722043. The next prime is 261200722087. The reversal of 261200722084 is 480227002162.

The square root of 261200722084 is 511078.

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., 147448320100 + 113752401984 = 383990^2 + 337272^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261200722087) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 48038614 + ... + 48044050.

Almost surely, 2^261200722084 is an apocalyptic number.

261200722084 is the 511078-th square number.

It is an amenable number.

261200722084 is a deficient number, since it is larger than the sum of its proper divisors (205918942109).

261200722084 is an frugal number, since it uses more digits than its factorization.

261200722084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10972 (or 5486 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 261200722084 in words is "two hundred sixty-one billion, two hundred million, seven hundred twenty-two thousand, eighty-four".