1642335265 has 4 divisors (see below), whose sum is σ = 1970802324. Its totient is φ = 1313868208.

The previous prime is 1642335257. The next prime is 1642335283. The reversal of 1642335265 is 5625332461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 272151009 + 1370184256 = 16497^2 + 37016^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642335265 - 2³ = 1642335257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164233522 + ... + 164233531.

It is an arithmetic number, because the mean of its divisors is an integer number (492700581).

Almost surely, 2^1642335265 is an apocalyptic number.

It is an amenable number.

1642335265 is a deficient number, since it is larger than the sum of its proper divisors (328467059).

1642335265 is an equidigital number, since it uses as much as digits as its factorization.

1642335265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328467058.

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

The square root of 1642335265 is about 40525.7358353923. The cubic root of 1642335265 is about 1179.8331816749.

The spelling of 1642335265 in words is "one billion, six hundred forty-two million, three hundred thirty-five thousand, two hundred sixty-five".