85805345513639 has 2 divisors, whose sum is σ = 85805345513640. Its totient is φ = 85805345513638.

The previous prime is 85805345513627. The next prime is 85805345513729. The reversal of 85805345513639 is 93631554350858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85805345513639 - 2⁴ = 85805345513623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85805345510639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42902672756819 + 42902672756820.

It is an arithmetic number, because the mean of its divisors is an integer number (42902672756820).

Almost surely, 2^{85805345513639} is an apocalyptic number.

85805345513639 is a deficient number, since it is larger than the sum of its proper divisors (1).

85805345513639 is an equidigital number, since it uses as much as digits as its factorization.

85805345513639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280000, while the sum is 65.

The spelling of 85805345513639 in words is "eighty-five trillion, eight hundred five billion, three hundred forty-five million, five hundred thirteen thousand, six hundred thirty-nine".