261432024247073 has 4 divisors (see below), whose sum is σ = 261439664694660. Its totient is φ = 261424383799488.

The previous prime is 261432024247063. The next prime is 261432024247087. The reversal of 261432024247073 is 370742420234162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141202290482449 + 120229733764624 = 11882857^2 + 10964932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261432024247073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261432024247063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3820172468 + ... + 3820240901.

It is an arithmetic number, because the mean of its divisors is an integer number (65359916173665).

Almost surely, 2^{261432024247073} is an apocalyptic number.

It is an amenable number.

261432024247073 is a deficient number, since it is larger than the sum of its proper divisors (7640447587).

261432024247073 is an equidigital number, since it uses as much as digits as its factorization.

261432024247073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640447586.

The product of its (nonzero) digits is 2709504, while the sum is 47.

The spelling of 261432024247073 in words is "two hundred sixty-one trillion, four hundred thirty-two billion, twenty-four million, two hundred forty-seven thousand, seventy-three".