261441373017743 has 4 divisors (see below), whose sum is σ = 261443913581568. Its totient is φ = 261438832453920.

The previous prime is 261441373017677. The next prime is 261441373017787. The reversal of 261441373017743 is 347710373144162.

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

It is a cyclic number.

It is not a de Polignac number, because 261441373017743 - 2³⁰ = 261440299275919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261441373017793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270127546 + ... + 1270333367.

It is an arithmetic number, because the mean of its divisors is an integer number (65360978395392).

Almost surely, 2^{261441373017743} is an apocalyptic number.

261441373017743 is a deficient number, since it is larger than the sum of its proper divisors (2540563825).

261441373017743 is a wasteful number, since it uses less digits than its factorization.

261441373017743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540563824.

The product of its (nonzero) digits is 7112448, while the sum is 53.

The spelling of 261441373017743 in words is "two hundred sixty-one trillion, four hundred forty-one billion, three hundred seventy-three million, seventeen thousand, seven hundred forty-three".