645350053546 has 16 divisors (see below), whose sum is σ = 1056040276608. Its totient is φ = 293337345600.

The previous prime is 645350053463. The next prime is 645350053549.

645350053546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×645350053546² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645350053496 and 645350053505.

It is not an unprimeable number, because it can be changed into a prime (645350053549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2656306 + ... + 2889058.

It is an arithmetic number, because the mean of its divisors is an integer number (66002517288).

Almost surely, 2^645350053546 is an apocalyptic number.

645350053546 is a deficient number, since it is larger than the sum of its proper divisors (410690223062).

645350053546 is a wasteful number, since it uses less digits than its factorization.

645350053546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358797.

The product of its (nonzero) digits is 3240000, while the sum is 46.

The spelling of 645350053546 in words is "six hundred forty-five billion, three hundred fifty million, fifty-three thousand, five hundred forty-six".