28643473351837 has 2 divisors, whose sum is σ = 28643473351838. Its totient is φ = 28643473351836.

The previous prime is 28643473351789. The next prime is 28643473351847. The reversal of 28643473351837 is 73815337434682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24152693582521 + 4490779769316 = 4914539^2 + 2119146^2 .

It is a cyclic number.

It is not a de Polignac number, because 28643473351837 - 2³¹ = 28641325868189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28643473351847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14321736675918 + 14321736675919.

It is an arithmetic number, because the mean of its divisors is an integer number (14321736675919).

Almost surely, 2^{28643473351837} is an apocalyptic number.

It is an amenable number.

28643473351837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28643473351837 is an equidigital number, since it uses as much as digits as its factorization.

28643473351837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 64.

The spelling of 28643473351837 in words is "twenty-eight trillion, six hundred forty-three billion, four hundred seventy-three million, three hundred fifty-one thousand, eight hundred thirty-seven".