13705036649 has 2 divisors, whose sum is σ = 13705036650. Its totient is φ = 13705036648.

The previous prime is 13705036637. The next prime is 13705036711. The reversal of 13705036649 is 94663050731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8678226649 + 5026810000 = 93157^2 + 70900^2 .

It is a cyclic number.

It is not a de Polignac number, because 13705036649 - 2²⁰ = 13703988073 is a prime.

It is not a weakly prime, because it can be changed into another prime (13705006649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6852518324 + 6852518325.

It is an arithmetic number, because the mean of its divisors is an integer number (6852518325).

Almost surely, 2^13705036649 is an apocalyptic number.

It is an amenable number.

13705036649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13705036649 is an equidigital number, since it uses as much as digits as its factorization.

13705036649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 13705036649 in words is "thirteen billion, seven hundred five million, thirty-six thousand, six hundred forty-nine".