38642240865 has 16 divisors (see below), whose sum is σ = 62875512000. Its totient is φ = 20259886272.

The previous prime is 38642240837. The next prime is 38642240909. The reversal of 38642240865 is 56804224683.

It is not a de Polignac number, because 38642240865 - 2¹² = 38642236769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21830890 + ... + 21832659.

It is an arithmetic number, because the mean of its divisors is an integer number (3929719500).

Almost surely, 2^38642240865 is an apocalyptic number.

It is an amenable number.

38642240865 is a deficient number, since it is larger than the sum of its proper divisors (24233271135).

38642240865 is a wasteful number, since it uses less digits than its factorization.

38642240865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43663616.

The product of its (nonzero) digits is 2211840, while the sum is 48.

The spelling of 38642240865 in words is "thirty-eight billion, six hundred forty-two million, two hundred forty thousand, eight hundred sixty-five".