12786838454 has 48 divisors (see below), whose sum is σ = 21718422432. Its totient is φ = 5632982784.

The previous prime is 12786838433. The next prime is 12786838487. The reversal of 12786838454 is 45483868721.

It is a super-2 number, since 2×12786838454² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12786838454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4328642 + ... + 4331594.

It is an arithmetic number, because the mean of its divisors is an integer number (452467134).

Almost surely, 2^12786838454 is an apocalyptic number.

12786838454 is a deficient number, since it is larger than the sum of its proper divisors (8931583978).

12786838454 is a wasteful number, since it uses less digits than its factorization.

12786838454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561 (or 3548 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 56.

The spelling of 12786838454 in words is "twelve billion, seven hundred eighty-six million, eight hundred thirty-eight thousand, four hundred fifty-four".