819315494523 has 12 divisors (see below), whose sum is σ = 1203514286520. Its totient is φ = 536952527136.

The previous prime is 819315494507. The next prime is 819315494533. The reversal of 819315494523 is 325494513918.

819315494523 is a `hidden beast` number, since 8 + 1 + 9 + 31 + 549 + 45 + 23 = 666.

It is not a de Polignac number, because 819315494523 - 2⁴ = 819315494507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 819315494523.

It is not an unprimeable number, because it can be changed into a prime (819315494533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 771482986 + ... + 771484047.

It is an arithmetic number, because the mean of its divisors is an integer number (100292857210).

Almost surely, 2^819315494523 is an apocalyptic number.

819315494523 is a deficient number, since it is larger than the sum of its proper divisors (384198791997).

819315494523 is a wasteful number, since it uses less digits than its factorization.

819315494523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542967098 (or 1542967095 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 819315494523 in words is "eight hundred nineteen billion, three hundred fifteen million, four hundred ninety-four thousand, five hundred twenty-three".