28056311597 has 2 divisors, whose sum is σ = 28056311598. Its totient is φ = 28056311596.

The previous prime is 28056311537. The next prime is 28056311611. The reversal of 28056311597 is 79511365082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28053235081 + 3076516 = 167491^2 + 1754^2 .

It is a cyclic number.

It is not a de Polignac number, because 28056311597 - 2¹² = 28056307501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28056311537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028155798 + 14028155799.

It is an arithmetic number, because the mean of its divisors is an integer number (14028155799).

Almost surely, 2^28056311597 is an apocalyptic number.

It is an amenable number.

28056311597 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056311597 is an equidigital number, since it uses as much as digits as its factorization.

28056311597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 28056311597 in words is "twenty-eight billion, fifty-six million, three hundred eleven thousand, five hundred ninety-seven".