28356322537 has 2 divisors, whose sum is σ = 28356322538. Its totient is φ = 28356322536.

The previous prime is 28356322499. The next prime is 28356322597. The reversal of 28356322537 is 73522365382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22299747561 + 6056574976 = 149331^2 + 77824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28356322537 is a prime.

It is not a weakly prime, because it can be changed into another prime (28356322597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14178161268 + 14178161269.

It is an arithmetic number, because the mean of its divisors is an integer number (14178161269).

Almost surely, 2^28356322537 is an apocalyptic number.

It is an amenable number.

28356322537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28356322537 is an equidigital number, since it uses as much as digits as its factorization.

28356322537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 46.

The spelling of 28356322537 in words is "twenty-eight billion, three hundred fifty-six million, three hundred twenty-two thousand, five hundred thirty-seven".