1819609201825 has 12 divisors (see below), whose sum is σ = 2277402473520. Its totient is φ = 1442082804560.

The previous prime is 1819609201789. The next prime is 1819609201843. The reversal of 1819609201825 is 5281029069181.

It is a happy number.

It is not a de Polignac number, because 1819609201825 - 2¹⁵ = 1819609169057 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, 340111195 + ... + 340116544.

It is an arithmetic number, because the mean of its divisors is an integer number (189783539460).

Almost surely, 2^{1819609201825} is an apocalyptic number.

It is an amenable number.

1819609201825 is a deficient number, since it is larger than the sum of its proper divisors (457793271695).

1819609201825 is a wasteful number, since it uses less digits than its factorization.

1819609201825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680227856 (or 680227851 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 52.

The spelling of 1819609201825 in words is "one trillion, eight hundred nineteen billion, six hundred nine million, two hundred one thousand, eight hundred twenty-five".