819964469918 has 32 divisors (see below), whose sum is σ = 1346174720352. Its totient is φ = 371486044800.

The previous prime is 819964469911. The next prime is 819964469993.

819964469918 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819964469911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13863248 + ... + 13922268.

It is an arithmetic number, because the mean of its divisors is an integer number (42067960011).

Almost surely, 2^819964469918 is an apocalyptic number.

819964469918 is a deficient number, since it is larger than the sum of its proper divisors (526210250434).

819964469918 is a wasteful number, since it uses less digits than its factorization.

819964469918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61100.

The product of its digits is 241864704, while the sum is 74.

The spelling of 819964469918 in words is "eight hundred nineteen billion, nine hundred sixty-four million, four hundred sixty-nine thousand, nine hundred eighteen".