28131786037 has 2 divisors, whose sum is σ = 28131786038. Its totient is φ = 28131786036.

The previous prime is 28131786019. The next prime is 28131786073. The reversal of 28131786037 is 73068713182.

Together with next prime (28131786073) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24735111076 + 3396674961 = 157274^2 + 58281^2 .

It is a cyclic number.

It is not a de Polignac number, because 28131786037 - 2¹⁵ = 28131753269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28131786077) 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, 14065893018 + 14065893019.

It is an arithmetic number, because the mean of its divisors is an integer number (14065893019).

Almost surely, 2^28131786037 is an apocalyptic number.

It is an amenable number.

28131786037 is a deficient number, since it is larger than the sum of its proper divisors (1).

28131786037 is an equidigital number, since it uses as much as digits as its factorization.

28131786037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 28131786037 in words is "twenty-eight billion, one hundred thirty-one million, seven hundred eighty-six thousand, thirty-seven".