28179906437 has 2 divisors, whose sum is σ = 28179906438. Its totient is φ = 28179906436.

The previous prime is 28179906427. The next prime is 28179906457. The reversal of 28179906437 is 73460997182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28051560196 + 128346241 = 167486^2 + 11329^2 .

It is a cyclic number.

It is not a de Polignac number, because 28179906437 - 2²² = 28175712133 is a prime.

It is a congruent number.

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, 14089953218 + 14089953219.

It is an arithmetic number, because the mean of its divisors is an integer number (14089953219).

Almost surely, 2^28179906437 is an apocalyptic number.

It is an amenable number.

28179906437 is a deficient number, since it is larger than the sum of its proper divisors (1).

28179906437 is an equidigital number, since it uses as much as digits as its factorization.

28179906437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 28179906437 in words is "twenty-eight billion, one hundred seventy-nine million, nine hundred six thousand, four hundred thirty-seven".