855594794729 has 2 divisors, whose sum is σ = 855594794730. Its totient is φ = 855594794728.

The previous prime is 855594794699. The next prime is 855594794731. The reversal of 855594794729 is 927497495558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633221245504 + 222373549225 = 795752^2 + 471565^2 .

It is a cyclic number.

It is not a de Polignac number, because 855594794729 - 2³⁶ = 786875317993 is a prime.

Together with 855594794731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (855594794779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427797397364 + 427797397365.

It is an arithmetic number, because the mean of its divisors is an integer number (427797397365).

Almost surely, 2^855594794729 is an apocalyptic number.

It is an amenable number.

855594794729 is a deficient number, since it is larger than the sum of its proper divisors (1).

855594794729 is an equidigital number, since it uses as much as digits as its factorization.

855594794729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072000, while the sum is 74.

The spelling of 855594794729 in words is "eight hundred fifty-five billion, five hundred ninety-four million, seven hundred ninety-four thousand, seven hundred twenty-nine".