643140262331 has 32 divisors (see below), whose sum is σ = 749560627200. Its totient is φ = 540438772896.

The previous prime is 643140262321. The next prime is 643140262333. The reversal of 643140262331 is 133262041346.

It is a cyclic number.

It is not a de Polignac number, because 643140262331 - 2¹⁰ = 643140261307 is a prime.

It is a super-2 number, since 2×643140262331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643140262291 and 643140262300.

It is not an unprimeable number, because it can be changed into a prime (643140262333) 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 31 ways as a sum of consecutive naturals, for example, 172560590 + ... + 172564316.

It is an arithmetic number, because the mean of its divisors is an integer number (23423769600).

Almost surely, 2^643140262331 is an apocalyptic number.

643140262331 is a deficient number, since it is larger than the sum of its proper divisors (106420364869).

643140262331 is a wasteful number, since it uses less digits than its factorization.

643140262331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5463.

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 643140262331 in words is "six hundred forty-three billion, one hundred forty million, two hundred sixty-two thousand, three hundred thirty-one".