851390208013 has 2 divisors, whose sum is σ = 851390208014. Its totient is φ = 851390208012.

The previous prime is 851390207971. The next prime is 851390208023. The reversal of 851390208013 is 310802093158.

851390208013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851268260164 + 121947849 = 922642^2 + 11043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851390208013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851390208023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425695104006 + 425695104007.

It is an arithmetic number, because the mean of its divisors is an integer number (425695104007).

Almost surely, 2^851390208013 is an apocalyptic number.

It is an amenable number.

851390208013 is a deficient number, since it is larger than the sum of its proper divisors (1).

851390208013 is an equidigital number, since it uses as much as digits as its factorization.

851390208013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 851390208013 in words is "eight hundred fifty-one billion, three hundred ninety million, two hundred eight thousand, thirteen".