3668637803865 has 16 divisors (see below), whose sum is σ = 5980571817408. Its totient is φ = 1919689718336.

The previous prime is 3668637803863. The next prime is 3668637803867. The reversal of 3668637803865 is 5683087368663.

It is an interprime number because it is at equal distance from previous prime (3668637803863) and next prime (3668637803867).

It is a cyclic number.

It is not a de Polignac number, because 3668637803865 - 2¹ = 3668637803863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3668637803865.

It is not an unprimeable number, because it can be changed into a prime (3668637803861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2307318579 + ... + 2307320168.

It is an arithmetic number, because the mean of its divisors is an integer number (373785738588).

Almost surely, 2^{3668637803865} is an apocalyptic number.

It is an amenable number.

3668637803865 is a deficient number, since it is larger than the sum of its proper divisors (2311934013543).

3668637803865 is a wasteful number, since it uses less digits than its factorization.

3668637803865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4614638808.

The product of its (nonzero) digits is 627056640, while the sum is 69.

The spelling of 3668637803865 in words is "three trillion, six hundred sixty-eight billion, six hundred thirty-seven million, eight hundred three thousand, eight hundred sixty-five".