28640850047 has 2 divisors, whose sum is σ = 28640850048. Its totient is φ = 28640850046.

The previous prime is 28640850037. The next prime is 28640850061. The reversal of 28640850047 is 74005804682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28640850047 - 2²⁰ = 28639801471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28640850037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14320425023 + 14320425024.

It is an arithmetic number, because the mean of its divisors is an integer number (14320425024).

Almost surely, 2^28640850047 is an apocalyptic number.

28640850047 is a deficient number, since it is larger than the sum of its proper divisors (1).

28640850047 is an equidigital number, since it uses as much as digits as its factorization.

28640850047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 28640850047 in words is "twenty-eight billion, six hundred forty million, eight hundred fifty thousand, forty-seven".