38278881687 has 4 divisors (see below), whose sum is σ = 51038508920. Its totient is φ = 25519254456.

The previous prime is 38278881671. The next prime is 38278881721. The reversal of 38278881687 is 78618887283.

38278881687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78618887283 = 3 ⋅26206295761.

It is not a de Polignac number, because 38278881687 - 2⁴ = 38278881671 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 (38278881617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6379813612 + ... + 6379813617.

It is an arithmetic number, because the mean of its divisors is an integer number (12759627230).

Almost surely, 2^38278881687 is an apocalyptic number.

38278881687 is a deficient number, since it is larger than the sum of its proper divisors (12759627233).

38278881687 is a wasteful number, since it uses less digits than its factorization.

38278881687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12759627232.

The product of its digits is 57802752, while the sum is 66.

The spelling of 38278881687 in words is "thirty-eight billion, two hundred seventy-eight million, eight hundred eighty-one thousand, six hundred eighty-seven".