10206071904989 has 2 divisors, whose sum is σ = 10206071904990. Its totient is φ = 10206071904988.

The previous prime is 10206071904979. The next prime is 10206071905031. The reversal of 10206071904989 is 98940917060201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10061850449764 + 144221455225 = 3172042^2 + 379765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10206071904989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10206071904929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103035952494 + 5103035952495.

It is an arithmetic number, because the mean of its divisors is an integer number (5103035952495).

Almost surely, 2^{10206071904989} is an apocalyptic number.

It is an amenable number.

10206071904989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10206071904989 is an equidigital number, since it uses as much as digits as its factorization.

10206071904989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 10206071904989 in words is "ten trillion, two hundred six billion, seventy-one million, nine hundred four thousand, nine hundred eighty-nine".