643425651113 has 24 divisors (see below), whose sum is σ = 750679268040. Its totient is φ = 549884401920.

The previous prime is 643425651097. The next prime is 643425651133. The reversal of 643425651113 is 311156524346.

It can be written as a sum of positive squares in 4 ways, for example, as 75387586624 + 568038064489 = 274568^2 + 753683^2 .

It is not a de Polignac number, because 643425651113 - 2⁴ = 643425651097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643425651133) 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 23 ways as a sum of consecutive naturals, for example, 73437653 + ... + 73446413.

It is an arithmetic number, because the mean of its divisors is an integer number (31278302835).

Almost surely, 2^643425651113 is an apocalyptic number.

It is an amenable number.

643425651113 is a deficient number, since it is larger than the sum of its proper divisors (107253616927).

643425651113 is a wasteful number, since it uses less digits than its factorization.

643425651113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13017 (or 13010 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The spelling of 643425651113 in words is "six hundred forty-three billion, four hundred twenty-five million, six hundred fifty-one thousand, one hundred thirteen".