12401543837 has 4 divisors (see below), whose sum is σ = 12401771040. Its totient is φ = 12401316636.

The previous prime is 12401543771. The next prime is 12401543849. The reversal of 12401543837 is 73834510421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12401543837 - 2¹² = 12401539741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12401543837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401543897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23138 + ... + 159180.

It is an arithmetic number, because the mean of its divisors is an integer number (3100442760).

Almost surely, 2^12401543837 is an apocalyptic number.

It is an amenable number.

12401543837 is a deficient number, since it is larger than the sum of its proper divisors (227203).

12401543837 is an equidigital number, since it uses as much as digits as its factorization.

12401543837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227202.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 12401543837 in words is "twelve billion, four hundred one million, five hundred forty-three thousand, eight hundred thirty-seven".