28091614357 has 2 divisors, whose sum is σ = 28091614358. Its totient is φ = 28091614356.

The previous prime is 28091614349. The next prime is 28091614373. The reversal of 28091614357 is 75341619082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23677207876 + 4414406481 = 153874^2 + 66441^2 .

It is a cyclic number.

It is not a de Polignac number, because 28091614357 - 2³ = 28091614349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28091614307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14045807178 + 14045807179.

It is an arithmetic number, because the mean of its divisors is an integer number (14045807179).

It is a 1-persistent number, because it is pandigital, but 2⋅28091614357 = 56183228714 is not.

Almost surely, 2^28091614357 is an apocalyptic number.

It is an amenable number.

28091614357 is a deficient number, since it is larger than the sum of its proper divisors (1).

28091614357 is an equidigital number, since it uses as much as digits as its factorization.

28091614357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 28091614357 in words is "twenty-eight billion, ninety-one million, six hundred fourteen thousand, three hundred fifty-seven".