645216053053 has 64 divisors (see below), whose sum is σ = 781005141504. Its totient is φ = 525329280000.

The previous prime is 645216053047. The next prime is 645216053059. The reversal of 645216053053 is 350350612546.

It is an interprime number because it is at equal distance from previous prime (645216053047) and next prime (645216053059).

It is not a de Polignac number, because 645216053053 - 2⁵ = 645216053021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645216052997 and 645216053015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645216053059) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 177401551 + ... + 177405187.

It is an arithmetic number, because the mean of its divisors is an integer number (12203205336).

Almost surely, 2^645216053053 is an apocalyptic number.

It is an amenable number.

645216053053 is a deficient number, since it is larger than the sum of its proper divisors (135789088451).

645216053053 is a wasteful number, since it uses less digits than its factorization.

645216053053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006.

The product of its (nonzero) digits is 324000, while the sum is 40.

Adding to 645216053053 its reverse (350350612546), we get a palindrome (995566665599).

The spelling of 645216053053 in words is "six hundred forty-five billion, two hundred sixteen million, fifty-three thousand, fifty-three".