1819993392897 has 32 divisors (see below), whose sum is σ = 2542670413824. Its totient is φ = 1156506595200.

The previous prime is 1819993392859. The next prime is 1819993392901. The reversal of 1819993392897 is 7982933999181.

It is not a de Polignac number, because 1819993392897 - 2⁷ = 1819993392769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1819993392857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60556528 + ... + 60586574.

It is an arithmetic number, because the mean of its divisors is an integer number (79458450432).

Almost surely, 2^{1819993392897} is an apocalyptic number.

It is an amenable number.

1819993392897 is a deficient number, since it is larger than the sum of its proper divisors (722677020927).

1819993392897 is a wasteful number, since it uses less digits than its factorization.

1819993392897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39869.

The product of its digits is 476171136, while the sum is 78.

The spelling of 1819993392897 in words is "one trillion, eight hundred nineteen billion, nine hundred ninety-three million, three hundred ninety-two thousand, eight hundred ninety-seven".