13278640653 has 24 divisors (see below), whose sum is σ = 20437899768. Its totient is φ = 8278612992.

The previous prime is 13278640649. The next prime is 13278640681. The reversal of 13278640653 is 35604687231.

It can be written as a sum of positive squares in 4 ways, for example, as 3234993129 + 10043647524 = 56877^2 + 100218^2 .

It is not a de Polignac number, because 13278640653 - 2² = 13278640649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13278640599 and 13278640608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13278640693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252376 + ... + 300417.

It is an arithmetic number, because the mean of its divisors is an integer number (851579157).

Almost surely, 2^13278640653 is an apocalyptic number.

It is an amenable number.

13278640653 is a deficient number, since it is larger than the sum of its proper divisors (7159259115).

13278640653 is a wasteful number, since it uses less digits than its factorization.

13278640653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552973 (or 552970 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 13278640653 in words is "thirteen billion, two hundred seventy-eight million, six hundred forty thousand, six hundred fifty-three".