3681485705987 has 2 divisors, whose sum is σ = 3681485705988. Its totient is φ = 3681485705986.

The previous prime is 3681485705983. The next prime is 3681485706007. The reversal of 3681485705987 is 7895075841863.

3681485705987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3681485705987 - 2² = 3681485705983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3681485705987.

It is not a weakly prime, because it can be changed into another prime (3681485705983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840742852993 + 1840742852994.

It is an arithmetic number, because the mean of its divisors is an integer number (1840742852994).

Almost surely, 2^{3681485705987} is an apocalyptic number.

3681485705987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681485705987 is an equidigital number, since it uses as much as digits as its factorization.

3681485705987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 406425600, while the sum is 71.

The spelling of 3681485705987 in words is "three trillion, six hundred eighty-one billion, four hundred eighty-five million, seven hundred five thousand, nine hundred eighty-seven".