12401543836 has 24 divisors (see below), whose sum is σ = 23678630640. Its totient is φ = 5636361600.

The previous prime is 12401543771. The next prime is 12401543849. The reversal of 12401543836 is 63834510421.

It is a junction number, because it is equal to n+sod(n) for n = 12401543795 and 12401543804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531046 + ... + 553906.

It is an arithmetic number, because the mean of its divisors is an integer number (986609610).

Almost surely, 2^12401543836 is an apocalyptic number.

It is an amenable number.

12401543836 is a deficient number, since it is larger than the sum of its proper divisors (11277086804).

12401543836 is a wasteful number, since it uses less digits than its factorization.

12401543836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35205 (or 35203 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 12401543836 in words is "twelve billion, four hundred one million, five hundred forty-three thousand, eight hundred thirty-six".