38478816339521 has 16 divisors (see below), whose sum is σ = 39419563653120. Its totient is φ = 37548097534080.

The previous prime is 38478816339497. The next prime is 38478816339533. The reversal of 38478816339521 is 12593361887483.

38478816339521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 38478816339521 - 2³⁴ = 38461636470337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38478816539521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167119445 + ... + 167349533.

It is an arithmetic number, because the mean of its divisors is an integer number (2463722728320).

Almost surely, 2^{38478816339521} is an apocalyptic number.

It is an amenable number.

38478816339521 is a deficient number, since it is larger than the sum of its proper divisors (940747313599).

38478816339521 is a wasteful number, since it uses less digits than its factorization.

38478816339521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251864.

The product of its digits is 209018880, while the sum is 68.

The spelling of 38478816339521 in words is "thirty-eight trillion, four hundred seventy-eight billion, eight hundred sixteen million, three hundred thirty-nine thousand, five hundred twenty-one".