643440198153 has 8 divisors (see below), whose sum is σ = 903073962400. Its totient is φ = 406383283008.

The previous prime is 643440198151. The next prime is 643440198169. The reversal of 643440198153 is 351891044346.

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

It is not a de Polignac number, because 643440198153 - 2¹ = 643440198151 is a prime.

It is a super-2 number, since 2×643440198153² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643440198151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5644212208 + ... + 5644212321.

It is an arithmetic number, because the mean of its divisors is an integer number (112884245300).

Almost surely, 2^643440198153 is an apocalyptic number.

It is an amenable number.

643440198153 is a deficient number, since it is larger than the sum of its proper divisors (259633764247).

643440198153 is a wasteful number, since it uses less digits than its factorization.

643440198153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11288424551.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 643440198153 in words is "six hundred forty-three billion, four hundred forty million, one hundred ninety-eight thousand, one hundred fifty-three".