819642033494 has 16 divisors (see below), whose sum is σ = 1255876878528. Its totient is φ = 401019949632.

The previous prime is 819642033493. The next prime is 819642033523. The reversal of 819642033494 is 494330246918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819642033493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419009 + ... + 1347164.

It is an arithmetic number, because the mean of its divisors is an integer number (78492304908).

Almost surely, 2^819642033494 is an apocalyptic number.

819642033494 is a deficient number, since it is larger than the sum of its proper divisors (436234845034).

819642033494 is a wasteful number, since it uses less digits than its factorization.

819642033494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771159.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 819642033494 in words is "eight hundred nineteen billion, six hundred forty-two million, thirty-three thousand, four hundred ninety-four".