645113633355053 has 16 divisors (see below), whose sum is σ = 656103534969600. Its totient is φ = 634177055218560.

The previous prime is 645113633354977. The next prime is 645113633355097. The reversal of 645113633355053 is 350553336311546.

It is a cyclic number.

It is not a de Polignac number, because 645113633355053 - 2⁸ = 645113633354797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645113633354986 and 645113633355004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645113633355853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204102425 + ... + 207239057.

It is an arithmetic number, because the mean of its divisors is an integer number (41006470935600).

Almost surely, 2^{645113633355053} is an apocalyptic number.

It is an amenable number.

645113633355053 is a deficient number, since it is larger than the sum of its proper divisors (10989901614547).

645113633355053 is a wasteful number, since it uses less digits than its factorization.

645113633355053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145132.

The product of its (nonzero) digits is 21870000, while the sum is 53.

Adding to 645113633355053 its reverse (350553336311546), we get a palindrome (995666969666599).

The spelling of 645113633355053 in words is "six hundred forty-five trillion, one hundred thirteen billion, six hundred thirty-three million, three hundred fifty-five thousand, fifty-three".