645215264116241 has 8 divisors (see below), whose sum is σ = 794111094297024. Its totient is φ = 510499989190800.

The previous prime is 645215264116217. The next prime is 645215264116309. The reversal of 645215264116241 is 142611462512546.

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

It is not a de Polignac number, because 645215264116241 - 2³⁸ = 644940386209297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645215264116241.

It is not an unprimeable number, because it can be changed into a prime (645215264116541) 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 7 ways as a sum of consecutive naturals, for example, 3545138813735 + ... + 3545138813916.

It is an arithmetic number, because the mean of its divisors is an integer number (99263886787128).

Almost surely, 2^{645215264116241} is an apocalyptic number.

It is an amenable number.

645215264116241 is a deficient number, since it is larger than the sum of its proper divisors (148895830180783).

645215264116241 is a wasteful number, since it uses less digits than its factorization.

645215264116241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7090277627671.

The product of its digits is 2764800, while the sum is 50.

The spelling of 645215264116241 in words is "six hundred forty-five trillion, two hundred fifteen billion, two hundred sixty-four million, one hundred sixteen thousand, two hundred forty-one".