38878131863 has 4 divisors (see below), whose sum is σ = 38886499200. Its totient is φ = 38869764528.

The previous prime is 38878131847. The next prime is 38878131869. The reversal of 38878131863 is 36813187883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36813187883 = 59 ⋅623952337.

It is a cyclic number.

It is not a de Polignac number, because 38878131863 - 2⁴ = 38878131847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38878131799 and 38878131808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38878131869) 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, 4176695 + ... + 4185992.

It is an arithmetic number, because the mean of its divisors is an integer number (9721624800).

Almost surely, 2^38878131863 is an apocalyptic number.

38878131863 is a deficient number, since it is larger than the sum of its proper divisors (8367337).

38878131863 is an equidigital number, since it uses as much as digits as its factorization.

38878131863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8367336.

The product of its digits is 4644864, while the sum is 56.

The spelling of 38878131863 in words is "thirty-eight billion, eight hundred seventy-eight million, one hundred thirty-one thousand, eight hundred sixty-three".