28179906457 has 2 divisors, whose sum is σ = 28179906458. Its totient is φ = 28179906456.

The previous prime is 28179906437. The next prime is 28179906523. The reversal of 28179906457 is 75460997182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21403982601 + 6775923856 = 146301^2 + 82316^2 .

It is a cyclic number.

It is not a de Polignac number, because 28179906457 - 2¹⁹ = 28179382169 is a prime.

It is not a weakly prime, because it can be changed into another prime (28179906427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14089953228 + 14089953229.

It is an arithmetic number, because the mean of its divisors is an integer number (14089953229).

Almost surely, 2^28179906457 is an apocalyptic number.

It is an amenable number.

28179906457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28179906457 is an equidigital number, since it uses as much as digits as its factorization.

28179906457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 58.

The spelling of 28179906457 in words is "twenty-eight billion, one hundred seventy-nine million, nine hundred six thousand, four hundred fifty-seven".