645054053355 has 32 divisors (see below), whose sum is σ = 1157283547200. Its totient is φ = 340872592896.

The previous prime is 645054053311. The next prime is 645054053359. The reversal of 645054053355 is 553350450546.

645054053355 is a `hidden beast` number, since 6 + 4 + 5 + 0 + 540 + 53 + 3 + 55 = 666.

It is not a de Polignac number, because 645054053355 - 2⁷ = 645054053227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 645054053355.

It is not an unprimeable number, because it can be changed into a prime (645054053359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21903534 + ... + 21932963.

It is an arithmetic number, because the mean of its divisors is an integer number (36165110850).

Almost surely, 2^645054053355 is an apocalyptic number.

645054053355 is a deficient number, since it is larger than the sum of its proper divisors (512229493845).

645054053355 is a wasteful number, since it uses less digits than its factorization.

645054053355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43836620 (or 43836614 counting only the distinct ones).

The product of its (nonzero) digits is 2700000, while the sum is 45.

The spelling of 645054053355 in words is "six hundred forty-five billion, fifty-four million, fifty-three thousand, three hundred fifty-five".