851613764149 has 2 divisors, whose sum is σ = 851613764150. Its totient is φ = 851613764148.

The previous prime is 851613764129. The next prime is 851613764213. The reversal of 851613764149 is 941467316158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601023416049 + 250590348100 = 775257^2 + 500590^2 .

It is a cyclic number.

It is not a de Polignac number, because 851613764149 - 2⁷ = 851613764021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 851613764149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851613764129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425806882074 + 425806882075.

It is an arithmetic number, because the mean of its divisors is an integer number (425806882075).

Almost surely, 2^851613764149 is an apocalyptic number.

It is an amenable number.

851613764149 is a deficient number, since it is larger than the sum of its proper divisors (1).

851613764149 is an equidigital number, since it uses as much as digits as its factorization.

851613764149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The spelling of 851613764149 in words is "eight hundred fifty-one billion, six hundred thirteen million, seven hundred sixty-four thousand, one hundred forty-nine".