38904917509 has 16 divisors (see below), whose sum is σ = 41402465280. Its totient is φ = 36492785280.

The previous prime is 38904917453. The next prime is 38904917539. The reversal of 38904917509 is 90571940983.

38904917509 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 38904917509 - 2⁹ = 38904916997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38904917509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38904917539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237177 + ... + 366145.

It is an arithmetic number, because the mean of its divisors is an integer number (2587654080).

Almost surely, 2^38904917509 is an apocalyptic number.

It is an amenable number.

38904917509 is a deficient number, since it is larger than the sum of its proper divisors (2497547771).

38904917509 is a wasteful number, since it uses less digits than its factorization.

38904917509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129300.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 38904917509 in words is "thirty-eight billion, nine hundred four million, nine hundred seventeen thousand, five hundred nine".