261866774383274 has 16 divisors (see below), whose sum is σ = 413474839596000. Its totient is φ = 124041860694864.

The previous prime is 261866774383241. The next prime is 261866774383367. The reversal of 261866774383274 is 472383477668162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8380649 + ... + 24371475.

It is an arithmetic number, because the mean of its divisors is an integer number (25842177474750).

Almost surely, 2^{261866774383274} is an apocalyptic number.

261866774383274 is a deficient number, since it is larger than the sum of its proper divisors (151608065212726).

261866774383274 is a wasteful number, since it uses less digits than its factorization.

261866774383274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16421797.

The product of its digits is 2731180032, while the sum is 74.

The spelling of 261866774383274 in words is "two hundred sixty-one trillion, eight hundred sixty-six billion, seven hundred seventy-four million, three hundred eighty-three thousand, two hundred seventy-four".