28465656449 has 2 divisors, whose sum is σ = 28465656450. Its totient is φ = 28465656448.

The previous prime is 28465656419. The next prime is 28465656487. The reversal of 28465656449 is 94465656482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19448254849 + 9017401600 = 139457^2 + 94960^2 .

It is a cyclic number.

It is not a de Polignac number, because 28465656449 - 2¹² = 28465652353 is a prime.

It is not a weakly prime, because it can be changed into another prime (28465656419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14232828224 + 14232828225.

It is an arithmetic number, because the mean of its divisors is an integer number (14232828225).

Almost surely, 2^28465656449 is an apocalyptic number.

It is an amenable number.

28465656449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28465656449 is an equidigital number, since it uses as much as digits as its factorization.

28465656449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49766400, while the sum is 59.

The spelling of 28465656449 in words is "twenty-eight billion, four hundred sixty-five million, six hundred fifty-six thousand, four hundred forty-nine".