28557602537 has 2 divisors, whose sum is σ = 28557602538. Its totient is φ = 28557602536.

The previous prime is 28557602533. The next prime is 28557602543. The reversal of 28557602537 is 73520675582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28528561216 + 29041321 = 168904^2 + 5389^2 .

It is a cyclic number.

It is not a de Polignac number, because 28557602537 - 2² = 28557602533 is a prime.

It is a super-2 number, since 2×28557602537² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28557602533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14278801268 + 14278801269.

It is an arithmetic number, because the mean of its divisors is an integer number (14278801269).

Almost surely, 2^28557602537 is an apocalyptic number.

It is an amenable number.

28557602537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28557602537 is an equidigital number, since it uses as much as digits as its factorization.

28557602537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 28557602537 in words is "twenty-eight billion, five hundred fifty-seven million, six hundred two thousand, five hundred thirty-seven".