85814500643 has 2 divisors, whose sum is σ = 85814500644. Its totient is φ = 85814500642.

The previous prime is 85814500523. The next prime is 85814500657. The reversal of 85814500643 is 34600541858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85814500643 - 2¹⁰ = 85814499619 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 85814500594 and 85814500603.

It is not a weakly prime, because it can be changed into another prime (85814500693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42907250321 + 42907250322.

It is an arithmetic number, because the mean of its divisors is an integer number (42907250322).

Almost surely, 2^85814500643 is an apocalyptic number.

85814500643 is a deficient number, since it is larger than the sum of its proper divisors (1).

85814500643 is an equidigital number, since it uses as much as digits as its factorization.

85814500643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 85814500643 in words is "eighty-five billion, eight hundred fourteen million, five hundred thousand, six hundred forty-three".