28056311537 has 2 divisors, whose sum is σ = 28056311538. Its totient is φ = 28056311536.

The previous prime is 28056311531. The next prime is 28056311597. The reversal of 28056311537 is 73511365082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17081444416 + 10974867121 = 130696^2 + 104761^2 .

It is a cyclic number.

It is not a de Polignac number, because 28056311537 - 2⁶ = 28056311473 is a prime.

It is a super-2 number, since 2×28056311537² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28056311494 and 28056311503.

It is not a weakly prime, because it can be changed into another prime (28056311531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028155768 + 14028155769.

It is an arithmetic number, because the mean of its divisors is an integer number (14028155769).

Almost surely, 2^28056311537 is an apocalyptic number.

It is an amenable number.

28056311537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056311537 is an equidigital number, since it uses as much as digits as its factorization.

28056311537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 28056311537 in words is "twenty-eight billion, fifty-six million, three hundred eleven thousand, five hundred thirty-seven".