28062294581 has 2 divisors, whose sum is σ = 28062294582. Its totient is φ = 28062294580.

The previous prime is 28062294563. The next prime is 28062294593. The reversal of 28062294581 is 18549226082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22796470225 + 5265824356 = 150985^2 + 72566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28062294581 is a prime.

It is a super-2 number, since 2×28062294581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28062234581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14031147290 + 14031147291.

It is an arithmetic number, because the mean of its divisors is an integer number (14031147291).

Almost surely, 2^28062294581 is an apocalyptic number.

It is an amenable number.

28062294581 is a deficient number, since it is larger than the sum of its proper divisors (1).

28062294581 is an equidigital number, since it uses as much as digits as its factorization.

28062294581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 28062294581 in words is "twenty-eight billion, sixty-two million, two hundred ninety-four thousand, five hundred eighty-one".