5685677681 has 2 divisors, whose sum is σ = 5685677682. Its totient is φ = 5685677680.

The previous prime is 5685677663. The next prime is 5685677707. The reversal of 5685677681 is 1867765865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5396371600 + 289306081 = 73460^2 + 17009^2 .

It is a cyclic number.

It is not a de Polignac number, because 5685677681 - 2⁶ = 5685677617 is a prime.

It is a super-2 number, since 2×5685677681² = 64653861384443075522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5685677681.

It is not a weakly prime, because it can be changed into another prime (5685677581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2842838840 + 2842838841.

It is an arithmetic number, because the mean of its divisors is an integer number (2842838841).

Almost surely, 2^5685677681 is an apocalyptic number.

It is an amenable number.

5685677681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5685677681 is an equidigital number, since it uses as much as digits as its factorization.

5685677681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 59.

The square root of 5685677681 is about 75403.4328197331. The cubic root of 5685677681 is about 1784.8185815250.

The spelling of 5685677681 in words is "five billion, six hundred eighty-five million, six hundred seventy-seven thousand, six hundred eighty-one".