38921572117 has 8 divisors (see below), whose sum is σ = 40546658880. Its totient is φ = 37328665440.

The previous prime is 38921572091. The next prime is 38921572121. The reversal of 38921572117 is 71127512983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38921572117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38921572127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8042553 + ... + 8047390.

It is an arithmetic number, because the mean of its divisors is an integer number (5068332360).

Almost surely, 2^38921572117 is an apocalyptic number.

It is an amenable number.

38921572117 is a deficient number, since it is larger than the sum of its proper divisors (1625086763).

38921572117 is a wasteful number, since it uses less digits than its factorization.

38921572117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16090043.

The product of its digits is 211680, while the sum is 46.

The spelling of 38921572117 in words is "thirty-eight billion, nine hundred twenty-one million, five hundred seventy-two thousand, one hundred seventeen".