288638636981 has 2 divisors, whose sum is σ = 288638636982. Its totient is φ = 288638636980.

The previous prime is 288638636969. The next prime is 288638637019. The reversal of 288638636981 is 189636836882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276896964100 + 11741672881 = 526210^2 + 108359^2 .

It is a cyclic number.

It is not a de Polignac number, because 288638636981 - 2¹⁴ = 288638620597 is a prime.

It is a super-2 number, since 2×288638636981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288638636581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144319318490 + 144319318491.

It is an arithmetic number, because the mean of its divisors is an integer number (144319318491).

Almost surely, 2^288638636981 is an apocalyptic number.

It is an amenable number.

288638636981 is a deficient number, since it is larger than the sum of its proper divisors (1).

288638636981 is an equidigital number, since it uses as much as digits as its factorization.

288638636981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 143327232, while the sum is 68.

The spelling of 288638636981 in words is "two hundred eighty-eight billion, six hundred thirty-eight million, six hundred thirty-six thousand, nine hundred eighty-one".