13605650513 has 12 divisors (see below), whose sum is σ = 17044442100. Its totient is φ = 10764909792.

The previous prime is 13605650507. The next prime is 13605650519. The reversal of 13605650513 is 31505650631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13605650507) and next prime (13605650519).

It can be written as a sum of positive squares in 2 ways, for example, as 3591245329 + 10014405184 = 59927^2 + 100072^2 .

It is not a de Polignac number, because 13605650513 - 2⁸ = 13605650257 is a prime.

It is a super-2 number, since 2×13605650513² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13605650519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10678838 + ... + 10680111.

It is an arithmetic number, because the mean of its divisors is an integer number (1420370175).

Almost surely, 2^13605650513 is an apocalyptic number.

13605650513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13605650513 is a deficient number, since it is larger than the sum of its proper divisors (3438791587).

13605650513 is a wasteful number, since it uses less digits than its factorization.

13605650513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21358976 (or 21358969 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 35.

The spelling of 13605650513 in words is "thirteen billion, six hundred five million, six hundred fifty thousand, five hundred thirteen".