368687947688681 has 2 divisors, whose sum is σ = 368687947688682. Its totient is φ = 368687947688680.

The previous prime is 368687947688617. The next prime is 368687947688717. The reversal of 368687947688681 is 186886749786863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 368112534415081 + 575413273600 = 19186259^2 + 758560^2 .

It is a cyclic number.

It is not a de Polignac number, because 368687947688681 - 2⁶ = 368687947688617 is a prime.

It is a super-2 number, since 2×368687947688681² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (368687947681681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184343973844340 + 184343973844341.

It is an arithmetic number, because the mean of its divisors is an integer number (184343973844341).

Almost surely, 2^{368687947688681} is an apocalyptic number.

It is an amenable number.

368687947688681 is a deficient number, since it is larger than the sum of its proper divisors (1).

368687947688681 is an equidigital number, since it uses as much as digits as its factorization.

368687947688681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224737099776, while the sum is 95.

The spelling of 368687947688681 in words is "three hundred sixty-eight trillion, six hundred eighty-seven billion, nine hundred forty-seven million, six hundred eighty-eight thousand, six hundred eighty-one".