12400503426 has 24 divisors (see below), whose sum is σ = 28448214444. Its totient is φ = 3890353920.

The previous prime is 12400503413. The next prime is 12400503431. The reversal of 12400503426 is 62430500421.

It can be written as a sum of positive squares in 2 ways, for example, as 9380891025 + 3019612401 = 96855^2 + 54951^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12400503426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20261955 + ... + 20262566.

Almost surely, 2^12400503426 is an apocalyptic number.

12400503426 is an abundant number, since it is smaller than the sum of its proper divisors (16047711018).

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

12400503426 is a wasteful number, since it uses less digits than its factorization.

12400503426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40524546 (or 40524543 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 12400503426 in words is "twelve billion, four hundred million, five hundred three thousand, four hundred twenty-six".