12526643645 has 8 divisors (see below), whose sum is σ = 15200871480. Its totient is φ = 9908715520.

The previous prime is 12526643639. The next prime is 12526643659. The reversal of 12526643645 is 54634662521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 109561 + 12526534084 = 331^2 + 111922^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12526643645 - 2⁴ = 12526643629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12526643596 and 12526643605.

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, 14074436 + ... + 14075325.

It is an arithmetic number, because the mean of its divisors is an integer number (1900108935).

Almost surely, 2^12526643645 is an apocalyptic number.

It is an amenable number.

12526643645 is a deficient number, since it is larger than the sum of its proper divisors (2674227835).

12526643645 is an equidigital number, since it uses as much as digits as its factorization.

12526643645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28149855.

The product of its digits is 1036800, while the sum is 44.

The spelling of 12526643645 in words is "twelve billion, five hundred twenty-six million, six hundred forty-three thousand, six hundred forty-five".