28225163805637 has 2 divisors, whose sum is σ = 28225163805638. Its totient is φ = 28225163805636.

The previous prime is 28225163805581. The next prime is 28225163805701. The reversal of 28225163805637 is 73650836152282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26261617402881 + 1963546402756 = 5124609^2 + 1401266^2 .

It is a cyclic number.

It is not a de Polignac number, because 28225163805637 - 2¹⁹ = 28225163281349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28225163808637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14112581902818 + 14112581902819.

It is an arithmetic number, because the mean of its divisors is an integer number (14112581902819).

Almost surely, 2^{28225163805637} is an apocalyptic number.

It is an amenable number.

28225163805637 is a deficient number, since it is larger than the sum of its proper divisors (1).

28225163805637 is an equidigital number, since it uses as much as digits as its factorization.

28225163805637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 28225163805637 in words is "twenty-eight trillion, two hundred twenty-five billion, one hundred sixty-three million, eight hundred five thousand, six hundred thirty-seven".