785685649937 has 2 divisors, whose sum is σ = 785685649938. Its totient is φ = 785685649936.

The previous prime is 785685649913. The next prime is 785685649967. The reversal of 785685649937 is 739946586587.

785685649937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743511277441 + 42174372496 = 862271^2 + 205364^2 .

It is a cyclic number.

It is not a de Polignac number, because 785685649937 - 2¹² = 785685645841 is a prime.

It is a super-2 number, since 2×785685649937² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (785685649967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392842824968 + 392842824969.

It is an arithmetic number, because the mean of its divisors is an integer number (392842824969).

Almost surely, 2^785685649937 is an apocalyptic number.

It is an amenable number.

785685649937 is a deficient number, since it is larger than the sum of its proper divisors (1).

785685649937 is an equidigital number, since it uses as much as digits as its factorization.

785685649937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2743372800, while the sum is 77.

The spelling of 785685649937 in words is "seven hundred eighty-five billion, six hundred eighty-five million, six hundred forty-nine thousand, nine hundred thirty-seven".