28431846517 has 2 divisors, whose sum is σ = 28431846518. Its totient is φ = 28431846516.

The previous prime is 28431846481. The next prime is 28431846557. The reversal of 28431846517 is 71564813482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27806896516 + 624950001 = 166754^2 + 24999^2 .

It is a cyclic number.

It is not a de Polignac number, because 28431846517 - 2¹⁹ = 28431322229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28431846557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14215923258 + 14215923259.

It is an arithmetic number, because the mean of its divisors is an integer number (14215923259).

Almost surely, 2^28431846517 is an apocalyptic number.

It is an amenable number.

28431846517 is a deficient number, since it is larger than the sum of its proper divisors (1).

28431846517 is an equidigital number, since it uses as much as digits as its factorization.

28431846517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 49.

The spelling of 28431846517 in words is "twenty-eight billion, four hundred thirty-one million, eight hundred forty-six thousand, five hundred seventeen".