28664125513 has 2 divisors, whose sum is σ = 28664125514. Its totient is φ = 28664125512.

The previous prime is 28664125507. The next prime is 28664125519. The reversal of 28664125513 is 31552146682.

It is a balanced prime because it is at equal distance from previous prime (28664125507) and next prime (28664125519).

It can be written as a sum of positive squares in only one way, i.e., 27773222409 + 890903104 = 166653^2 + 29848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28664125513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28664125513.

It is not a weakly prime, because it can be changed into another prime (28664125519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14332062756 + 14332062757.

It is an arithmetic number, because the mean of its divisors is an integer number (14332062757).

Almost surely, 2^28664125513 is an apocalyptic number.

It is an amenable number.

28664125513 is a deficient number, since it is larger than the sum of its proper divisors (1).

28664125513 is an equidigital number, since it uses as much as digits as its factorization.

28664125513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The spelling of 28664125513 in words is "twenty-eight billion, six hundred sixty-four million, one hundred twenty-five thousand, five hundred thirteen".