685536038827 has 2 divisors, whose sum is σ = 685536038828. Its totient is φ = 685536038826.

The previous prime is 685536038713. The next prime is 685536038843. The reversal of 685536038827 is 728830635586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685536038827 is a prime.

It is a super-2 number, since 2×685536038827² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (685536038027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342768019413 + 342768019414.

It is an arithmetic number, because the mean of its divisors is an integer number (342768019414).

Almost surely, 2^685536038827 is an apocalyptic number.

685536038827 is a deficient number, since it is larger than the sum of its proper divisors (1).

685536038827 is an equidigital number, since it uses as much as digits as its factorization.

685536038827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58060800, while the sum is 61.

The spelling of 685536038827 in words is "six hundred eighty-five billion, five hundred thirty-six million, thirty-eight thousand, eight hundred twenty-seven".