643140303041345 has 16 divisors (see below), whose sum is σ = 814142368439040. Its totient is φ = 486379880388864.

The previous prime is 643140303041333. The next prime is 643140303041363. The reversal of 643140303041345 is 543140303041346.

It is a cyclic number.

It is not a de Polignac number, because 643140303041345 - 2¹⁰ = 643140303040321 is a prime.

It is a super-2 number, since 2×643140303041345² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7310860904 + ... + 7310948873.

It is an arithmetic number, because the mean of its divisors is an integer number (50883898027440).

Almost surely, 2^{643140303041345} is an apocalyptic number.

It is an amenable number.

643140303041345 is a deficient number, since it is larger than the sum of its proper divisors (171002065397695).

643140303041345 is a wasteful number, since it uses less digits than its factorization.

643140303041345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14621810264.

The product of its (nonzero) digits is 622080, while the sum is 41.

Subtracting from 643140303041345 its reverse (543140303041346), we obtain a palindrome (99999999999999).

The spelling of 643140303041345 in words is "six hundred forty-three trillion, one hundred forty billion, three hundred three million, forty-one thousand, three hundred forty-five".