3565820243642 has 4 divisors (see below), whose sum is σ = 5348730365466. Its totient is φ = 1782910121820.

The previous prime is 3565820243639. The next prime is 3565820243659. The reversal of 3565820243642 is 2463420285653.

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

It can be written as a sum of positive squares in only one way, i.e., 3178949927521 + 386870316121 = 1782961^2 + 621989^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891455060909 + ... + 891455060912.

Almost surely, 2^{3565820243642} is an apocalyptic number.

3565820243642 is a deficient number, since it is larger than the sum of its proper divisors (1782910121824).

3565820243642 is a wasteful number, since it uses less digits than its factorization.

3565820243642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782910121823.

The product of its (nonzero) digits is 8294400, while the sum is 50.

The spelling of 3565820243642 in words is "three trillion, five hundred sixty-five billion, eight hundred twenty million, two hundred forty-three thousand, six hundred forty-two".