1288949262817 has 2 divisors, whose sum is σ = 1288949262818. Its totient is φ = 1288949262816.

The previous prime is 1288949262779. The next prime is 1288949262857. The reversal of 1288949262817 is 7182629498821.

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., 1254498561936 + 34450700881 = 1120044^2 + 185609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1288949262817 is a prime.

It is a super-2 number, since 2×1288949262817² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1288949262857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644474631408 + 644474631409.

It is an arithmetic number, because the mean of its divisors is an integer number (644474631409).

Almost surely, 2^{1288949262817} is an apocalyptic number.

It is an amenable number.

1288949262817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288949262817 is an equidigital number, since it uses as much as digits as its factorization.

1288949262817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55738368, while the sum is 67.

The spelling of 1288949262817 in words is "one trillion, two hundred eighty-eight billion, nine hundred forty-nine million, two hundred sixty-two thousand, eight hundred seventeen".