819574542916 has 6 divisors (see below), whose sum is σ = 1434255450110. Its totient is φ = 409787271456.

The previous prime is 819574542907. The next prime is 819574542923. The reversal of 819574542916 is 619245475918.

It can be written as a sum of positive squares in only one way, i.e., 781272138816 + 38302404100 = 883896^2 + 195710^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102446817861 + ... + 102446817868.

Almost surely, 2^819574542916 is an apocalyptic number.

It is an amenable number.

819574542916 is a deficient number, since it is larger than the sum of its proper divisors (614680907194).

819574542916 is a wasteful number, since it uses less digits than its factorization.

819574542916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204893635733 (or 204893635731 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 61.

The spelling of 819574542916 in words is "eight hundred nineteen billion, five hundred seventy-four million, five hundred forty-two thousand, nine hundred sixteen".