28057497777943 has 2 divisors, whose sum is σ = 28057497777944. Its totient is φ = 28057497777942.

The previous prime is 28057497777899. The next prime is 28057497777961. The reversal of 28057497777943 is 34977779475082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28057497777943 - 2⁹ = 28057497777431 is a prime.

It is a super-2 number, since 2×28057497777943² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28057497777443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028748888971 + 14028748888972.

It is an arithmetic number, because the mean of its divisors is an integer number (14028748888972).

Almost surely, 2^{28057497777943} is an apocalyptic number.

28057497777943 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057497777943 is an equidigital number, since it uses as much as digits as its factorization.

28057497777943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5227649280, while the sum is 79.

The spelling of 28057497777943 in words is "twenty-eight trillion, fifty-seven billion, four hundred ninety-seven million, seven hundred seventy-seven thousand, nine hundred forty-three".