13136721601 has 2 divisors, whose sum is σ = 13136721602. Its totient is φ = 13136721600.

The previous prime is 13136721589. The next prime is 13136721667. The reversal of 13136721601 is 10612763131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11122866225 + 2013855376 = 105465^2 + 44876^2 .

It is a cyclic number.

It is not a de Polignac number, because 13136721601 - 2⁷ = 13136721473 is a prime.

It is not a weakly prime, because it can be changed into another prime (13136721401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6568360800 + 6568360801.

It is an arithmetic number, because the mean of its divisors is an integer number (6568360801).

Almost surely, 2^13136721601 is an apocalyptic number.

It is an amenable number.

13136721601 is a deficient number, since it is larger than the sum of its proper divisors (1).

13136721601 is an equidigital number, since it uses as much as digits as its factorization.

13136721601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 13136721601 in words is "thirteen billion, one hundred thirty-six million, seven hundred twenty-one thousand, six hundred one".