28177755013 has 2 divisors, whose sum is σ = 28177755014. Its totient is φ = 28177755012.

The previous prime is 28177755007. The next prime is 28177755031. The reversal of 28177755013 is 31055777182.

Together with next prime (28177755031) 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., 26524356769 + 1653398244 = 162863^2 + 40662^2 .

It is a cyclic number.

It is not a de Polignac number, because 28177755013 - 2⁵ = 28177754981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28177755413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14088877506 + 14088877507.

It is an arithmetic number, because the mean of its divisors is an integer number (14088877507).

Almost surely, 2^28177755013 is an apocalyptic number.

It is an amenable number.

28177755013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28177755013 is an equidigital number, since it uses as much as digits as its factorization.

28177755013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 411600, while the sum is 46.

The spelling of 28177755013 in words is "twenty-eight billion, one hundred seventy-seven million, seven hundred fifty-five thousand, thirteen".