643465135 has 8 divisors (see below), whose sum is σ = 805730400. Its totient is φ = 492390624.

The previous prime is 643465127. The next prime is 643465139. The reversal of 643465135 is 531564346.

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

It is not a de Polignac number, because 643465135 - 2³ = 643465127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643465094 and 643465103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643465139) 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, 2797560 + ... + 2797789.

It is an arithmetic number, because the mean of its divisors is an integer number (100716300).

Almost surely, 2^643465135 is an apocalyptic number.

643465135 is a deficient number, since it is larger than the sum of its proper divisors (162265265).

643465135 is a wasteful number, since it uses less digits than its factorization.

643465135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5595377.

The product of its digits is 129600, while the sum is 37.

The square root of 643465135 is about 25366.6145750670. The cubic root of 643465135 is about 863.3263706333.

The spelling of 643465135 in words is "six hundred forty-three million, four hundred sixty-five thousand, one hundred thirty-five".