13958643709 has 2 divisors, whose sum is σ = 13958643710. Its totient is φ = 13958643708.

The previous prime is 13958643697. The next prime is 13958643737. The reversal of 13958643709 is 90734685931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11438302500 + 2520341209 = 106950^2 + 50203^2 .

It is a cyclic number.

It is not a de Polignac number, because 13958643709 - 2¹³ = 13958635517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13958643709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13958647709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6979321854 + 6979321855.

It is an arithmetic number, because the mean of its divisors is an integer number (6979321855).

Almost surely, 2^13958643709 is an apocalyptic number.

It is an amenable number.

13958643709 is a deficient number, since it is larger than the sum of its proper divisors (1).

13958643709 is an equidigital number, since it uses as much as digits as its factorization.

13958643709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 13958643709 in words is "thirteen billion, nine hundred fifty-eight million, six hundred forty-three thousand, seven hundred nine".