643155630231 has 8 divisors (see below), whose sum is σ = 857785936000. Its totient is φ = 428647872312.

The previous prime is 643155630209. The next prime is 643155630241. The reversal of 643155630231 is 132036551346.

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

It is not a de Polignac number, because 643155630231 - 2²¹ = 643153533079 is a prime.

It is a super-2 number, since 2×643155630231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 643155630231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643155630241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30624715 + ... + 30645708.

It is an arithmetic number, because the mean of its divisors is an integer number (107223242000).

Almost surely, 2^643155630231 is an apocalyptic number.

643155630231 is a deficient number, since it is larger than the sum of its proper divisors (214630305769).

643155630231 is a wasteful number, since it uses less digits than its factorization.

643155630231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61273925.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 643155630231 in words is "six hundred forty-three billion, one hundred fifty-five million, six hundred thirty thousand, two hundred thirty-one".