28264274497 has 2 divisors, whose sum is σ = 28264274498. Its totient is φ = 28264274496.

The previous prime is 28264274471. The next prime is 28264274527. The reversal of 28264274497 is 79447246282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17532143281 + 10732131216 = 132409^2 + 103596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28264274497 is a prime.

It is not a weakly prime, because it can be changed into another prime (28264274197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14132137248 + 14132137249.

It is an arithmetic number, because the mean of its divisors is an integer number (14132137249).

Almost surely, 2^28264274497 is an apocalyptic number.

It is an amenable number.

28264274497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28264274497 is an equidigital number, since it uses as much as digits as its factorization.

28264274497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 55.

The spelling of 28264274497 in words is "twenty-eight billion, two hundred sixty-four million, two hundred seventy-four thousand, four hundred ninety-seven".