85494671357813 has 2 divisors, whose sum is σ = 85494671357814. Its totient is φ = 85494671357812.

The previous prime is 85494671357743. The next prime is 85494671357833. The reversal of 85494671357813 is 31875317649458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85491604191889 + 3067165924 = 9246167^2 + 55382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85494671357813 is a prime.

It is a super-2 number, since 2×85494671357813² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85494671357833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42747335678906 + 42747335678907.

It is an arithmetic number, because the mean of its divisors is an integer number (42747335678907).

Almost surely, 2^{85494671357813} is an apocalyptic number.

It is an amenable number.

85494671357813 is a deficient number, since it is larger than the sum of its proper divisors (1).

85494671357813 is an equidigital number, since it uses as much as digits as its factorization.

85494671357813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 609638400, while the sum is 71.

The spelling of 85494671357813 in words is "eighty-five trillion, four hundred ninety-four billion, six hundred seventy-one million, three hundred fifty-seven thousand, eight hundred thirteen".