10218985639 has 2 divisors, whose sum is σ = 10218985640. Its totient is φ = 10218985638.

The previous prime is 10218985573. The next prime is 10218985643. The reversal of 10218985639 is 93658981201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10218985639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10218985649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5109492819 + 5109492820.

It is an arithmetic number, because the mean of its divisors is an integer number (5109492820).

Almost surely, 2^10218985639 is an apocalyptic number.

10218985639 is a deficient number, since it is larger than the sum of its proper divisors (1).

10218985639 is an equidigital number, since it uses as much as digits as its factorization.

10218985639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 10218985639 in words is "ten billion, two hundred eighteen million, nine hundred eighty-five thousand, six hundred thirty-nine".