645635165453 has 8 divisors (see below), whose sum is σ = 650503308000. Its totient is φ = 640781321040.

The previous prime is 645635165423. The next prime is 645635165471. The reversal of 645635165453 is 354561536546.

645635165453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645635165453 - 2¹² = 645635161357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645635165395 and 645635165404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645635165423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3483875 + ... + 3664512.

It is an arithmetic number, because the mean of its divisors is an integer number (81312913500).

Almost surely, 2^645635165453 is an apocalyptic number.

It is an amenable number.

645635165453 is a deficient number, since it is larger than the sum of its proper divisors (4868142547).

645635165453 is a wasteful number, since it uses less digits than its factorization.

645635165453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7149067.

The product of its digits is 19440000, while the sum is 53.

The spelling of 645635165453 in words is "six hundred forty-five billion, six hundred thirty-five million, one hundred sixty-five thousand, four hundred fifty-three".