28178210244473 has 2 divisors, whose sum is σ = 28178210244474. Its totient is φ = 28178210244472.

The previous prime is 28178210244461. The next prime is 28178210244493. The reversal of 28178210244473 is 37444201287182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20085482512489 + 8092727731984 = 4481683^2 + 2844772^2 .

It is a cyclic number.

It is not a de Polignac number, because 28178210244473 - 2²⁰ = 28178209195897 is a prime.

It is not a weakly prime, because it can be changed into another prime (28178210244493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14089105122236 + 14089105122237.

It is an arithmetic number, because the mean of its divisors is an integer number (14089105122237).

Almost surely, 2^{28178210244473} is an apocalyptic number.

It is an amenable number.

28178210244473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28178210244473 is an equidigital number, since it uses as much as digits as its factorization.

28178210244473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4816896, while the sum is 53.

The spelling of 28178210244473 in words is "twenty-eight trillion, one hundred seventy-eight billion, two hundred ten million, two hundred forty-four thousand, four hundred seventy-three".