28277371457 has 2 divisors, whose sum is σ = 28277371458. Its totient is φ = 28277371456.

The previous prime is 28277371429. The next prime is 28277371477. The reversal of 28277371457 is 75417377282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23893739776 + 4383631681 = 154576^2 + 66209^2 .

It is a cyclic number.

It is not a de Polignac number, because 28277371457 - 2⁸ = 28277371201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28277371399 and 28277371408.

It is not a weakly prime, because it can be changed into another prime (28277371477) 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, 14138685728 + 14138685729.

It is an arithmetic number, because the mean of its divisors is an integer number (14138685729).

Almost surely, 2^28277371457 is an apocalyptic number.

It is an amenable number.

28277371457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28277371457 is an equidigital number, since it uses as much as digits as its factorization.

28277371457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4609920, while the sum is 53.

The spelling of 28277371457 in words is "twenty-eight billion, two hundred seventy-seven million, three hundred seventy-one thousand, four hundred fifty-seven".