8518357281457 has 2 divisors, whose sum is σ = 8518357281458. Its totient is φ = 8518357281456.

The previous prime is 8518357281451. The next prime is 8518357281509. The reversal of 8518357281457 is 7541827538158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6052957996176 + 2465399285281 = 2460276^2 + 1570159^2 .

It is a cyclic number.

It is not a de Polignac number, because 8518357281457 - 2³⁵ = 8483997543089 is a prime.

It is not a weakly prime, because it can be changed into another prime (8518357281451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259178640728 + 4259178640729.

It is an arithmetic number, because the mean of its divisors is an integer number (4259178640729).

Almost surely, 2^{8518357281457} is an apocalyptic number.

It is an amenable number.

8518357281457 is a deficient number, since it is larger than the sum of its proper divisors (1).

8518357281457 is an equidigital number, since it uses as much as digits as its factorization.

8518357281457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264000, while the sum is 64.

The spelling of 8518357281457 in words is "eight trillion, five hundred eighteen billion, three hundred fifty-seven million, two hundred eighty-one thousand, four hundred fifty-seven".