1642445365 has 8 divisors (see below), whose sum is σ = 2150110368. Its totient is φ = 1194505680.

The previous prime is 1642445359. The next prime is 1642445369. The reversal of 1642445365 is 5635442461.

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

It is not a de Polignac number, because 1642445365 - 2⁷ = 1642445237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642445369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14931267 + ... + 14931376.

It is an arithmetic number, because the mean of its divisors is an integer number (268763796).

Almost surely, 2^1642445365 is an apocalyptic number.

It is an amenable number.

1642445365 is a deficient number, since it is larger than the sum of its proper divisors (507665003).

1642445365 is a wasteful number, since it uses less digits than its factorization.

1642445365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29862659.

The product of its digits is 345600, while the sum is 40.

The square root of 1642445365 is about 40527.0942086896. The cubic root of 1642445365 is about 1179.8595459083.

The spelling of 1642445365 in words is "one billion, six hundred forty-two million, four hundred forty-five thousand, three hundred sixty-five".