643125727341 has 8 divisors (see below), whose sum is σ = 952778855360. Its totient is φ = 428750484876.

The previous prime is 643125727339. The next prime is 643125727369. The reversal of 643125727341 is 143727521346.

It is a happy number.

643125727341 is a `hidden beast` number, since 6 + 4 + 3 + 1 + 2 + 572 + 73 + 4 + 1 = 666.

It is not a de Polignac number, because 643125727341 - 2¹ = 643125727339 is a prime.

It is a super-2 number, since 2×643125727341² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643125727241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11909735665 + ... + 11909735718.

It is an arithmetic number, because the mean of its divisors is an integer number (119097356920).

Almost surely, 2^643125727341 is an apocalyptic number.

It is an amenable number.

643125727341 is a deficient number, since it is larger than the sum of its proper divisors (309653128019).

643125727341 is a wasteful number, since it uses less digits than its factorization.

643125727341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23819471392 (or 23819471386 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The spelling of 643125727341 in words is "six hundred forty-three billion, one hundred twenty-five million, seven hundred twenty-seven thousand, three hundred forty-one".