53636436651321 has 12 divisors (see below), whose sum is σ = 77922684462948. Its totient is φ = 35550932962464.

The previous prime is 53636436651277. The next prime is 53636436651379. The reversal of 53636436651321 is 12315663463635.

53636436651321 is a `hidden beast` number, since 5 + 3 + 6 + 3 + 6 + 43 + 66 + 513 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46234832144400 + 7401604506921 = 6799620^2 + 2720589^2 .

It is a de Polignac number, because none of the positive numbers 2^k-53636436651321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53636436656321) 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, 17224287670 + ... + 17224290783.

It is an arithmetic number, because the mean of its divisors is an integer number (6493557038579).

Almost surely, 2^{53636436651321} is an apocalyptic number.

It is an amenable number.

53636436651321 is a deficient number, since it is larger than the sum of its proper divisors (24286247811627).

53636436651321 is a wasteful number, since it uses less digits than its factorization.

53636436651321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34448578632 (or 34448578629 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 54.

The spelling of 53636436651321 in words is "fifty-three trillion, six hundred thirty-six billion, four hundred thirty-six million, six hundred fifty-one thousand, three hundred twenty-one".