13656540213 has 6 divisors (see below), whose sum is σ = 19726113654. Its totient is φ = 9104360136.

The previous prime is 13656540211. The next prime is 13656540217. The reversal of 13656540213 is 31204565631.

13656540213 is a `hidden beast` number, since 1 + 36 + 565 + 40 + 21 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8685867204 + 4970673009 = 93198^2 + 70503^2 .

It is not a de Polignac number, because 13656540213 - 2¹ = 13656540211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656540211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 758696670 + ... + 758696687.

It is an arithmetic number, because the mean of its divisors is an integer number (3287685609).

Almost surely, 2^13656540213 is an apocalyptic number.

It is an amenable number.

13656540213 is a deficient number, since it is larger than the sum of its proper divisors (6069573441).

13656540213 is a wasteful number, since it uses less digits than its factorization.

13656540213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517393363 (or 1517393360 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 13656540213 in words is "thirteen billion, six hundred fifty-six million, five hundred forty thousand, two hundred thirteen".