28061169427 has 2 divisors, whose sum is σ = 28061169428. Its totient is φ = 28061169426.

The previous prime is 28061169397. The next prime is 28061169467. The reversal of 28061169427 is 72496116082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28061169427 is a prime.

It is a super-2 number, since 2×28061169427² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28061169467) 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, 14030584713 + 14030584714.

It is an arithmetic number, because the mean of its divisors is an integer number (14030584714).

Almost surely, 2^28061169427 is an apocalyptic number.

28061169427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28061169427 is an equidigital number, since it uses as much as digits as its factorization.

28061169427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 28061169427 in words is "twenty-eight billion, sixty-one million, one hundred sixty-nine thousand, four hundred twenty-seven".