38581317987 has 8 divisors (see below), whose sum is σ = 51454905936. Its totient is φ = 25714304352.

The previous prime is 38581317949. The next prime is 38581317997. The reversal of 38581317987 is 78971318583.

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

It is not a de Polignac number, because 38581317987 - 2¹² = 38581313891 is a prime.

It is a super-2 number, since 2×38581317987² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38581317987.

It is not an unprimeable number, because it can be changed into a prime (38581317997) 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, 1629868 + ... + 1653369.

It is an arithmetic number, because the mean of its divisors is an integer number (6431863242).

Almost surely, 2^38581317987 is an apocalyptic number.

38581317987 is a deficient number, since it is larger than the sum of its proper divisors (12873587949).

38581317987 is a wasteful number, since it uses less digits than its factorization.

38581317987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287157.

The product of its digits is 10160640, while the sum is 60.

The spelling of 38581317987 in words is "thirty-eight billion, five hundred eighty-one million, three hundred seventeen thousand, nine hundred eighty-seven".