28568377499 has 2 divisors, whose sum is σ = 28568377500. Its totient is φ = 28568377498.

The previous prime is 28568377489. The next prime is 28568377529. The reversal of 28568377499 is 99477386582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28568377499 - 2¹² = 28568373403 is a prime.

It is not a weakly prime, because it can be changed into another prime (28568377469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14284188749 + 14284188750.

It is an arithmetic number, because the mean of its divisors is an integer number (14284188750).

Almost surely, 2^28568377499 is an apocalyptic number.

28568377499 is a deficient number, since it is larger than the sum of its proper divisors (1).

28568377499 is an equidigital number, since it uses as much as digits as its factorization.

28568377499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 68.

The spelling of 28568377499 in words is "twenty-eight billion, five hundred sixty-eight million, three hundred seventy-seven thousand, four hundred ninety-nine".