261543674103105 has 96 divisors (see below), whose sum is σ = 450524176502400. Its totient is φ = 129116509777920.

The previous prime is 261543674103067. The next prime is 261543674103119. The reversal of 261543674103105 is 501301476345162.

It is not a de Polignac number, because 261543674103105 - 2¹⁷ = 261543673972033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12580858051 + ... + 12580878839.

It is an arithmetic number, because the mean of its divisors is an integer number (4692960171900).

Almost surely, 2^{261543674103105} is an apocalyptic number.

It is an amenable number.

261543674103105 is a deficient number, since it is larger than the sum of its proper divisors (188980502399295).

261543674103105 is a wasteful number, since it uses less digits than its factorization.

261543674103105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34195 (or 34134 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 261543674103105 in words is "two hundred sixty-one trillion, five hundred forty-three billion, six hundred seventy-four million, one hundred three thousand, one hundred five".