12812379858 has 48 divisors (see below), whose sum is σ = 30228868800. Its totient is φ = 3906493920.

The previous prime is 12812379857. The next prime is 12812379859. The reversal of 12812379858 is 85897321821.

It is an interprime number because it is at equal distance from previous prime (12812379857) and next prime (12812379859).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12812379857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 635998 + ... + 655833.

It is an arithmetic number, because the mean of its divisors is an integer number (629768100).

Almost surely, 2^12812379858 is an apocalyptic number.

12812379858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12812379858 is an abundant number, since it is smaller than the sum of its proper divisors (17416488942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12812379858 is a wasteful number, since it uses less digits than its factorization.

12812379858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291887 (or 1291884 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 12812379858 in words is "twelve billion, eight hundred twelve million, three hundred seventy-nine thousand, eight hundred fifty-eight".