645266344011345 has 48 divisors (see below), whose sum is σ = 1278611016713472. Its totient is φ = 294893719459200.

The previous prime is 645266344011343. The next prime is 645266344011349. The reversal of 645266344011345 is 543110443662546.

645266344011345 is a `hidden beast` number, since 6 + 4 + 5 + 2 + 6 + 63 + 440 + 1 + 134 + 5 = 666.

645266344011345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645266344011345 - 2¹ = 645266344011343 is a prime.

It is a super-3 number, since 3×645266344011345³ (a number of 45 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 645266344011291 and 645266344011300.

It is not an unprimeable number, because it can be changed into a prime (645266344011343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 294673606 + ... + 296855295.

It is an arithmetic number, because the mean of its divisors is an integer number (26637729514864).

Almost surely, 2^{645266344011345} is an apocalyptic number.

It is an amenable number.

645266344011345 is a deficient number, since it is larger than the sum of its proper divisors (633344672702127).

645266344011345 is a wasteful number, since it uses less digits than its factorization.

645266344011345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591532382 (or 591532379 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 54.

The spelling of 645266344011345 in words is "six hundred forty-five trillion, two hundred sixty-six billion, three hundred forty-four million, eleven thousand, three hundred forty-five".