38688309505 has 8 divisors (see below), whose sum is σ = 47558312424. Its totient is φ = 30195753600.

The previous prime is 38688309497. The next prime is 38688309511. The reversal of 38688309505 is 50590388683.

It can be written as a sum of positive squares in 4 ways, for example, as 3342805489 + 35345504016 = 57817^2 + 188004^2 .

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

It is not a de Polignac number, because 38688309505 - 2³ = 38688309497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94361526 + ... + 94361935.

It is an arithmetic number, because the mean of its divisors is an integer number (5944789053).

Almost surely, 2^38688309505 is an apocalyptic number.

It is an amenable number.

38688309505 is a deficient number, since it is larger than the sum of its proper divisors (8870002919).

38688309505 is a wasteful number, since it uses less digits than its factorization.

38688309505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188723507.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 38688309505 in words is "thirty-eight billion, six hundred eighty-eight million, three hundred nine thousand, five hundred five".