819312985923 has 8 divisors (see below), whose sum is σ = 1093198176000. Its totient is φ = 545818226568.

The previous prime is 819312985879. The next prime is 819312985963. The reversal of 819312985923 is 329589213918.

819312985923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 819312985923 - 2¹² = 819312981827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (819312985963) 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, 97602783 + ... + 97611176.

It is an arithmetic number, because the mean of its divisors is an integer number (136649772000).

Almost surely, 2^819312985923 is an apocalyptic number.

819312985923 is a deficient number, since it is larger than the sum of its proper divisors (273885190077).

819312985923 is a wasteful number, since it uses less digits than its factorization.

819312985923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195215361.

The product of its digits is 8398080, while the sum is 60.

The spelling of 819312985923 in words is "eight hundred nineteen billion, three hundred twelve million, nine hundred eighty-five thousand, nine hundred twenty-three".