28057547066401 has 2 divisors, whose sum is σ = 28057547066402. Its totient is φ = 28057547066400.

The previous prime is 28057547066389. The next prime is 28057547066543. The reversal of 28057547066401 is 10466074575082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27570690608400 + 486856458001 = 5250780^2 + 697751^2 .

It is a cyclic number.

It is not a de Polignac number, because 28057547066401 - 2¹³ = 28057547058209 is a prime.

It is a super-2 number, since 2×28057547066401² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28057547066201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028773533200 + 14028773533201.

It is an arithmetic number, because the mean of its divisors is an integer number (14028773533201).

Almost surely, 2^{28057547066401} is an apocalyptic number.

It is an amenable number.

28057547066401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057547066401 is an equidigital number, since it uses as much as digits as its factorization.

28057547066401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 28057547066401 in words is "twenty-eight trillion, fifty-seven billion, five hundred forty-seven million, sixty-six thousand, four hundred one".