643716243151 has 8 divisors (see below), whose sum is σ = 648372412800. Its totient is φ = 639060432600.

The previous prime is 643716243077. The next prime is 643716243199. The reversal of 643716243151 is 151342617346.

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 not a de Polignac number, because 643716243151 - 2¹⁷ = 643716112079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643716243098 and 643716243107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643716243551) 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, 4270926 + ... + 4419076.

It is an arithmetic number, because the mean of its divisors is an integer number (81046551600).

Almost surely, 2^643716243151 is an apocalyptic number.

643716243151 is a deficient number, since it is larger than the sum of its proper divisors (4656169649).

643716243151 is a wasteful number, since it uses less digits than its factorization.

643716243151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179549.

The product of its digits is 362880, while the sum is 43.

The spelling of 643716243151 in words is "six hundred forty-three billion, seven hundred sixteen million, two hundred forty-three thousand, one hundred fifty-one".