13505796637 has 2 divisors, whose sum is σ = 13505796638. Its totient is φ = 13505796636.

The previous prime is 13505796611. The next prime is 13505796671. The reversal of 13505796637 is 73669750531.

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., 13499186596 + 6610041 = 116186^2 + 2571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13505796637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13505796037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6752898318 + 6752898319.

It is an arithmetic number, because the mean of its divisors is an integer number (6752898319).

Almost surely, 2^13505796637 is an apocalyptic number.

It is an amenable number.

13505796637 is a deficient number, since it is larger than the sum of its proper divisors (1).

13505796637 is an equidigital number, since it uses as much as digits as its factorization.

13505796637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3572100, while the sum is 52.

The spelling of 13505796637 in words is "thirteen billion, five hundred five million, seven hundred ninety-six thousand, six hundred thirty-seven".