856592479991 has 2 divisors, whose sum is σ = 856592479992. Its totient is φ = 856592479990.

The previous prime is 856592479961. The next prime is 856592479993. The reversal of 856592479991 is 199974295658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856592479991 - 2¹⁸ = 856592217847 is a prime.

Together with 856592479993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856592479993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428296239995 + 428296239996.

It is an arithmetic number, because the mean of its divisors is an integer number (428296239996).

Almost surely, 2^856592479991 is an apocalyptic number.

856592479991 is a deficient number, since it is larger than the sum of its proper divisors (1).

856592479991 is an equidigital number, since it uses as much as digits as its factorization.

856592479991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 440899200, while the sum is 74.

The spelling of 856592479991 in words is "eight hundred fifty-six billion, five hundred ninety-two million, four hundred seventy-nine thousand, nine hundred ninety-one".