368640728969 has 2 divisors, whose sum is σ = 368640728970. Its totient is φ = 368640728968.

The previous prime is 368640728957. The next prime is 368640728993. The reversal of 368640728969 is 969827046863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367332966400 + 1307762569 = 606080^2 + 36163^2 .

It is a cyclic number.

It is not a de Polignac number, because 368640728969 - 2⁸ = 368640728713 is a prime.

It is a super-2 number, since 2×368640728969² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 368640728899 and 368640728908.

It is not a weakly prime, because it can be changed into another prime (368640725969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184320364484 + 184320364485.

It is an arithmetic number, because the mean of its divisors is an integer number (184320364485).

Almost surely, 2^368640728969 is an apocalyptic number.

It is an amenable number.

368640728969 is a deficient number, since it is larger than the sum of its proper divisors (1).

368640728969 is an equidigital number, since it uses as much as digits as its factorization.

368640728969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188116992, while the sum is 68.

The spelling of 368640728969 in words is "three hundred sixty-eight billion, six hundred forty million, seven hundred twenty-eight thousand, nine hundred sixty-nine".