851783021053 has 2 divisors, whose sum is σ = 851783021054. Its totient is φ = 851783021052.

The previous prime is 851783021021. The next prime is 851783021059. The reversal of 851783021053 is 350120387158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737946285444 + 113836735609 = 859038^2 + 337397^2 .

It is a cyclic number.

It is not a de Polignac number, because 851783021053 - 2⁵ = 851783021021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851783021059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425891510526 + 425891510527.

It is an arithmetic number, because the mean of its divisors is an integer number (425891510527).

Almost surely, 2^851783021053 is an apocalyptic number.

It is an amenable number.

851783021053 is a deficient number, since it is larger than the sum of its proper divisors (1).

851783021053 is an equidigital number, since it uses as much as digits as its factorization.

851783021053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 851783021053 in words is "eight hundred fifty-one billion, seven hundred eighty-three million, twenty-one thousand, fifty-three".