3685662756857 has 2 divisors, whose sum is σ = 3685662756858. Its totient is φ = 3685662756856.

The previous prime is 3685662756851. The next prime is 3685662756869. The reversal of 3685662756857 is 7586572665863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3662951965456 + 22710791401 = 1913884^2 + 150701^2 .

It is a cyclic number.

It is not a de Polignac number, because 3685662756857 - 2¹⁸ = 3685662494713 is a prime.

It is not a weakly prime, because it can be changed into another prime (3685662756851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842831378428 + 1842831378429.

It is an arithmetic number, because the mean of its divisors is an integer number (1842831378429).

Almost surely, 2^{3685662756857} is an apocalyptic number.

It is an amenable number.

3685662756857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685662756857 is an equidigital number, since it uses as much as digits as its factorization.

3685662756857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192000, while the sum is 74.

The spelling of 3685662756857 in words is "three trillion, six hundred eighty-five billion, six hundred sixty-two million, seven hundred fifty-six thousand, eight hundred fifty-seven".