261443044427075 has 12 divisors (see below), whose sum is σ = 370502142959760. Its totient is φ = 179275230464160.

The previous prime is 261443044427039. The next prime is 261443044427099. The reversal of 261443044427075 is 570724440344162.

It is not a de Polignac number, because 261443044427075 - 2¹⁸ = 261443044164931 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 746980126760 + ... + 746980127109.

It is an arithmetic number, because the mean of its divisors is an integer number (30875178579980).

Almost surely, 2^{261443044427075} is an apocalyptic number.

261443044427075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261443044427075 is a deficient number, since it is larger than the sum of its proper divisors (109059098532685).

261443044427075 is a wasteful number, since it uses less digits than its factorization.

261443044427075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493960253886 (or 1493960253881 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 53.

The spelling of 261443044427075 in words is "two hundred sixty-one trillion, four hundred forty-three billion, forty-four million, four hundred twenty-seven thousand, seventy-five".