28637517457 has 2 divisors, whose sum is σ = 28637517458. Its totient is φ = 28637517456.

The previous prime is 28637517427. The next prime is 28637517499. The reversal of 28637517457 is 75471573682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20501657856 + 8135859601 = 143184^2 + 90199^2 .

It is a cyclic number.

It is not a de Polignac number, because 28637517457 - 2¹¹ = 28637515409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28637517398 and 28637517407.

It is not a weakly prime, because it can be changed into another prime (28637517427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14318758728 + 14318758729.

It is an arithmetic number, because the mean of its divisors is an integer number (14318758729).

Almost surely, 2^28637517457 is an apocalyptic number.

It is an amenable number.

28637517457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28637517457 is an equidigital number, since it uses as much as digits as its factorization.

28637517457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 55.

The spelling of 28637517457 in words is "twenty-eight billion, six hundred thirty-seven million, five hundred seventeen thousand, four hundred fifty-seven".