12435528641 has 2 divisors, whose sum is σ = 12435528642. Its totient is φ = 12435528640.

The previous prime is 12435528631. The next prime is 12435528691. The reversal of 12435528641 is 14682553421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9432488641 + 3003040000 = 97121^2 + 54800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12435528641 is a prime.

It is a super-2 number, since 2×12435528641² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12435528631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6217764320 + 6217764321.

It is an arithmetic number, because the mean of its divisors is an integer number (6217764321).

Almost surely, 2^12435528641 is an apocalyptic number.

It is an amenable number.

12435528641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12435528641 is an equidigital number, since it uses as much as digits as its factorization.

12435528641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 41.

The spelling of 12435528641 in words is "twelve billion, four hundred thirty-five million, five hundred twenty-eight thousand, six hundred forty-one".