38685387487 has 4 divisors (see below), whose sum is σ = 40367360880. Its totient is φ = 37003414096.

The previous prime is 38685387479. The next prime is 38685387511. The reversal of 38685387487 is 78478358683.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38685387487 - 2³ = 38685387479 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 (38685382487) 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 3 ways as a sum of consecutive naturals, for example, 840986662 + ... + 840986707.

It is an arithmetic number, because the mean of its divisors is an integer number (10091840220).

Almost surely, 2^38685387487 is an apocalyptic number.

38685387487 is a deficient number, since it is larger than the sum of its proper divisors (1681973393).

38685387487 is a wasteful number, since it uses less digits than its factorization.

38685387487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681973392.

The product of its digits is 216760320, while the sum is 67.

The spelling of 38685387487 in words is "thirty-eight billion, six hundred eighty-five million, three hundred eighty-seven thousand, four hundred eighty-seven".