368535972809 has 2 divisors, whose sum is σ = 368535972810. Its totient is φ = 368535972808.

The previous prime is 368535972719. The next prime is 368535972811. The reversal of 368535972809 is 908279535863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319541478400 + 48994494409 = 565280^2 + 221347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-368535972809 is a prime.

Together with 368535972811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (368535972509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184267986404 + 184267986405.

It is an arithmetic number, because the mean of its divisors is an integer number (184267986405).

Almost surely, 2^368535972809 is an apocalyptic number.

It is an amenable number.

368535972809 is a deficient number, since it is larger than the sum of its proper divisors (1).

368535972809 is an equidigital number, since it uses as much as digits as its factorization.

368535972809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97977600, while the sum is 65.

The spelling of 368535972809 in words is "three hundred sixty-eight billion, five hundred thirty-five million, nine hundred seventy-two thousand, eight hundred nine".