642464165 has 8 divisors (see below), whose sum is σ = 881093760. Its totient is φ = 440546832.

The previous prime is 642464117. The next prime is 642464177. The reversal of 642464165 is 561464246.

642464165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 642464165 - 2⁶ = 642464101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9178025 + ... + 9178094.

It is an arithmetic number, because the mean of its divisors is an integer number (110136720).

Almost surely, 2^642464165 is an apocalyptic number.

It is an amenable number.

642464165 is a deficient number, since it is larger than the sum of its proper divisors (238629595).

642464165 is a wasteful number, since it uses less digits than its factorization.

642464165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18356131.

The product of its digits is 138240, while the sum is 38.

The square root of 642464165 is about 25346.8768293058. The cubic root of 642464165 is about 862.8784767571.

The spelling of 642464165 in words is "six hundred forty-two million, four hundred sixty-four thousand, one hundred sixty-five".