643141461 has 8 divisors (see below), whose sum is σ = 869269120. Its totient is φ = 422887392.

The previous prime is 643141459. The next prime is 643141489. The reversal of 643141461 is 164141346.

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

It is not a de Polignac number, because 643141461 - 2¹ = 643141459 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643141441) 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, 1468141 + ... + 1468578.

It is an arithmetic number, because the mean of its divisors is an integer number (108658640).

Almost surely, 2^643141461 is an apocalyptic number.

It is an amenable number.

643141461 is a deficient number, since it is larger than the sum of its proper divisors (226127659).

643141461 is a wasteful number, since it uses less digits than its factorization.

643141461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936795.

The product of its digits is 6912, while the sum is 30.

The square root of 643141461 is about 25360.2338514455. The cubic root of 643141461 is about 863.1815903641.

The spelling of 643141461 in words is "six hundred forty-three million, one hundred forty-one thousand, four hundred sixty-one".