261646127444730 has 32 divisors (see below), whose sum is σ = 717657949563264. Its totient is φ = 59804829130176.

The previous prime is 261646127444707. The next prime is 261646127444731. The reversal of 261646127444730 is 37444721646162.

It is not an unprimeable number, because it can be changed into a prime (261646127444731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622966969897 + ... + 622966970316.

It is an arithmetic number, because the mean of its divisors is an integer number (22426810923852).

Almost surely, 2^{261646127444730} is an apocalyptic number.

261646127444730 is an abundant number, since it is smaller than the sum of its proper divisors (456011822118534).

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

261646127444730 is a wasteful number, since it uses less digits than its factorization.

261646127444730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245933940230.

The product of its (nonzero) digits is 32514048, while the sum is 57.

The spelling of 261646127444730 in words is "two hundred sixty-one trillion, six hundred forty-six billion, one hundred twenty-seven million, four hundred forty-four thousand, seven hundred thirty".