12371806643 has 4 divisors (see below), whose sum is σ = 14139207600. Its totient is φ = 10604405688.

The previous prime is 12371806631. The next prime is 12371806669. The reversal of 12371806643 is 34660817321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12371806643 - 2¹⁰ = 12371805619 is a prime.

It is a super-2 number, since 2×12371806643² (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 12371806643.

It is not an unprimeable number, because it can be changed into a prime (12371806673) 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, 883700468 + ... + 883700481.

It is an arithmetic number, because the mean of its divisors is an integer number (3534801900).

Almost surely, 2^12371806643 is an apocalyptic number.

12371806643 is a deficient number, since it is larger than the sum of its proper divisors (1767400957).

12371806643 is an equidigital number, since it uses as much as digits as its factorization.

12371806643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767400956.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 12371806643 in words is "twelve billion, three hundred seventy-one million, eight hundred six thousand, six hundred forty-three".