685247592671 has 2 divisors, whose sum is σ = 685247592672. Its totient is φ = 685247592670.

The previous prime is 685247592637. The next prime is 685247592677. The reversal of 685247592671 is 176295742586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685247592671 - 2⁶ = 685247592607 is a prime.

It is a super-2 number, since 2×685247592671² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685247592677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342623796335 + 342623796336.

It is an arithmetic number, because the mean of its divisors is an integer number (342623796336).

Almost surely, 2^685247592671 is an apocalyptic number.

685247592671 is a deficient number, since it is larger than the sum of its proper divisors (1).

685247592671 is an equidigital number, since it uses as much as digits as its factorization.

685247592671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50803200, while the sum is 62.

The spelling of 685247592671 in words is "six hundred eighty-five billion, two hundred forty-seven million, five hundred ninety-two thousand, six hundred seventy-one".