851359623613 has 2 divisors, whose sum is σ = 851359623614. Its totient is φ = 851359623612.

The previous prime is 851359623599. The next prime is 851359623643. The reversal of 851359623613 is 316326953158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824503952484 + 26855671129 = 908022^2 + 163877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851359623613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851359623643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425679811806 + 425679811807.

It is an arithmetic number, because the mean of its divisors is an integer number (425679811807).

Almost surely, 2^851359623613 is an apocalyptic number.

It is an amenable number.

851359623613 is a deficient number, since it is larger than the sum of its proper divisors (1).

851359623613 is an equidigital number, since it uses as much as digits as its factorization.

851359623613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The spelling of 851359623613 in words is "eight hundred fifty-one billion, three hundred fifty-nine million, six hundred twenty-three thousand, six hundred thirteen".