1821668265274 has 64 divisors (see below), whose sum is σ = 3230102453760. Its totient is φ = 759606336000.

The previous prime is 1821668265253. The next prime is 1821668265283. The reversal of 1821668265274 is 4725628661281.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83280559 + ... + 83302429.

It is an arithmetic number, because the mean of its divisors is an integer number (50470350840).

Almost surely, 2^{1821668265274} is an apocalyptic number.

1821668265274 is a deficient number, since it is larger than the sum of its proper divisors (1408434188486).

1821668265274 is a wasteful number, since it uses less digits than its factorization.

1821668265274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23687.

The product of its digits is 15482880, while the sum is 58.

The spelling of 1821668265274 in words is "one trillion, eight hundred twenty-one billion, six hundred sixty-eight million, two hundred sixty-five thousand, two hundred seventy-four".