28545463237 has 2 divisors, whose sum is σ = 28545463238. Its totient is φ = 28545463236.

The previous prime is 28545463223. The next prime is 28545463267. The reversal of 28545463237 is 73236454582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25871435716 + 2674027521 = 160846^2 + 51711^2 .

It is a cyclic number.

It is not a de Polignac number, because 28545463237 - 2⁷ = 28545463109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28545463267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272731618 + 14272731619.

It is an arithmetic number, because the mean of its divisors is an integer number (14272731619).

Almost surely, 2^28545463237 is an apocalyptic number.

It is an amenable number.

28545463237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28545463237 is an equidigital number, since it uses as much as digits as its factorization.

28545463237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 49.

The spelling of 28545463237 in words is "twenty-eight billion, five hundred forty-five million, four hundred sixty-three thousand, two hundred thirty-seven".