38364816873521 has 4 divisors (see below), whose sum is σ = 38366819545332. Its totient is φ = 38362814201712.

The previous prime is 38364816873511. The next prime is 38364816873547. The reversal of 38364816873521 is 12537861846383.

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 2442906480400 + 35921910393121 = 1562980^2 + 5993489^2 .

It is a cyclic number.

It is not a de Polignac number, because 38364816873521 - 2¹⁰ = 38364816872497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38364816873511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001307170 + ... + 1001345483.

It is an arithmetic number, because the mean of its divisors is an integer number (9591704886333).

Almost surely, 2^{38364816873521} is an apocalyptic number.

It is an amenable number.

38364816873521 is a deficient number, since it is larger than the sum of its proper divisors (2002671811).

38364816873521 is a wasteful number, since it uses less digits than its factorization.

38364816873521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002671810.

The product of its digits is 139345920, while the sum is 65.

The spelling of 38364816873521 in words is "thirty-eight trillion, three hundred sixty-four billion, eight hundred sixteen million, eight hundred seventy-three thousand, five hundred twenty-one".