28317733481 has 2 divisors, whose sum is σ = 28317733482. Its totient is φ = 28317733480.

The previous prime is 28317733471. The next prime is 28317733511. The reversal of 28317733481 is 18433771382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27994309225 + 323424256 = 167315^2 + 17984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28317733481 is a prime.

It is a super-2 number, since 2×28317733481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28317733441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14158866740 + 14158866741.

It is an arithmetic number, because the mean of its divisors is an integer number (14158866741).

Almost surely, 2^28317733481 is an apocalyptic number.

It is an amenable number.

28317733481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317733481 is an equidigital number, since it uses as much as digits as its factorization.

28317733481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The spelling of 28317733481 in words is "twenty-eight billion, three hundred seventeen million, seven hundred thirty-three thousand, four hundred eighty-one".