645020324326153 has 8 divisors (see below), whose sum is σ = 646071751911680. Its totient is φ = 643968989173440.

The previous prime is 645020324326123. The next prime is 645020324326187. The reversal of 645020324326153 is 351623423020546.

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 645020324326153 - 2²⁵ = 645020290771721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645020324326123) 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, 9133425 + ... + 37060222.

It is an arithmetic number, because the mean of its divisors is an integer number (80758968988960).

Almost surely, 2^{645020324326153} is an apocalyptic number.

It is an amenable number.

645020324326153 is a deficient number, since it is larger than the sum of its proper divisors (1051427585527).

645020324326153 is a wasteful number, since it uses less digits than its factorization.

645020324326153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46216407.

The product of its (nonzero) digits is 3110400, while the sum is 46.

Adding to 645020324326153 its reverse (351623423020546), we get a palindrome (996643747346699).

The spelling of 645020324326153 in words is "six hundred forty-five trillion, twenty billion, three hundred twenty-four million, three hundred twenty-six thousand, one hundred fifty-three".