645154044143143 has 8 divisors (see below), whose sum is σ = 646393713589008. Its totient is φ = 643914398001024.

The previous prime is 645154044143083. The next prime is 645154044143159. The reversal of 645154044143143 is 341341440451546.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645154044143143 is a prime.

It is a super-2 number, since 2×645154044143143² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645154044143173) 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, 50111871 + ... + 61656367.

It is an arithmetic number, because the mean of its divisors is an integer number (80799214198626).

Almost surely, 2^{645154044143143} is an apocalyptic number.

645154044143143 is a deficient number, since it is larger than the sum of its proper divisors (1239669445865).

645154044143143 is a wasteful number, since it uses less digits than its factorization.

645154044143143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11651873.

The product of its (nonzero) digits is 5529600, while the sum is 49.

Adding to 645154044143143 its reverse (341341440451546), we get a palindrome (986495484594689).

The spelling of 645154044143143 in words is "six hundred forty-five trillion, one hundred fifty-four billion, forty-four million, one hundred forty-three thousand, one hundred forty-three".