12653634443 has 2 divisors, whose sum is σ = 12653634444. Its totient is φ = 12653634442.

The previous prime is 12653634397. The next prime is 12653634457. The reversal of 12653634443 is 34443635621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12653634443 - 2⁶ = 12653634379 is a prime.

It is a super-2 number, since 2×12653634443² (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 12653634443.

It is not a weakly prime, because it can be changed into another prime (12653634473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6326817221 + 6326817222.

It is an arithmetic number, because the mean of its divisors is an integer number (6326817222).

Almost surely, 2^12653634443 is an apocalyptic number.

12653634443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12653634443 is an equidigital number, since it uses as much as digits as its factorization.

12653634443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 41.

The spelling of 12653634443 in words is "twelve billion, six hundred fifty-three million, six hundred thirty-four thousand, four hundred forty-three".