718237870138361 has 2 divisors, whose sum is σ = 718237870138362. Its totient is φ = 718237870138360.

The previous prime is 718237870138357. The next prime is 718237870138447. The reversal of 718237870138361 is 163831078732817.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710543348928361 + 7694521210000 = 26656019^2 + 2773900^2 .

It is a cyclic number.

It is not a de Polignac number, because 718237870138361 - 2² = 718237870138357 is a prime.

It is not a weakly prime, because it can be changed into another prime (718237870138961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359118935069180 + 359118935069181.

It is an arithmetic number, because the mean of its divisors is an integer number (359118935069181).

Almost surely, 2^{718237870138361} is an apocalyptic number.

It is an amenable number.

718237870138361 is a deficient number, since it is larger than the sum of its proper divisors (1).

718237870138361 is an equidigital number, since it uses as much as digits as its factorization.

718237870138361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56899584, while the sum is 65.

The spelling of 718237870138361 in words is "seven hundred eighteen trillion, two hundred thirty-seven billion, eight hundred seventy million, one hundred thirty-eight thousand, three hundred sixty-one".