12653535434 has 4 divisors (see below), whose sum is σ = 18980303154. Its totient is φ = 6326767716.

The previous prime is 12653535397. The next prime is 12653535449. The reversal of 12653535434 is 43453535621.

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

It can be written as a sum of positive squares in only one way, i.e., 9940688209 + 2712847225 = 99703^2 + 52085^2 .

It is a super-2 number, since 2×12653535434² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12653535391 and 12653535400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3163383857 + ... + 3163383860.

Almost surely, 2^12653535434 is an apocalyptic number.

12653535434 is a deficient number, since it is larger than the sum of its proper divisors (6326767720).

12653535434 is an equidigital number, since it uses as much as digits as its factorization.

12653535434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326767719.

The product of its digits is 648000, while the sum is 41.

The spelling of 12653535434 in words is "twelve billion, six hundred fifty-three million, five hundred thirty-five thousand, four hundred thirty-four".