10639242989 has 2 divisors, whose sum is σ = 10639242990. Its totient is φ = 10639242988.

The previous prime is 10639242893. The next prime is 10639243001. The reversal of 10639242989 is 98924293601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8829421225 + 1809821764 = 93965^2 + 42542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10639242989 is a prime.

It is a super-2 number, since 2×10639242989² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10639242989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10639241989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5319621494 + 5319621495.

It is an arithmetic number, because the mean of its divisors is an integer number (5319621495).

Almost surely, 2^10639242989 is an apocalyptic number.

It is an amenable number.

10639242989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10639242989 is an equidigital number, since it uses as much as digits as its factorization.

10639242989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 10639242989 in words is "ten billion, six hundred thirty-nine million, two hundred forty-two thousand, nine hundred eighty-nine".