38778236542543 has 4 divisors (see below), whose sum is σ = 38778545665360. Its totient is φ = 38777927419728.

The previous prime is 38778236542501. The next prime is 38778236542571. The reversal of 38778236542543 is 34524563287783.

It is a happy number.

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 38778236542543 - 2²⁹ = 38777699671631 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 (38778236542043) 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, 154373163 + ... + 154624156.

It is an arithmetic number, because the mean of its divisors is an integer number (9694636416340).

Almost surely, 2^{38778236542543} is an apocalyptic number.

38778236542543 is a deficient number, since it is larger than the sum of its proper divisors (309122817).

38778236542543 is a wasteful number, since it uses less digits than its factorization.

38778236542543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309122816.

The product of its digits is 812851200, while the sum is 67.

The spelling of 38778236542543 in words is "thirty-eight trillion, seven hundred seventy-eight billion, two hundred thirty-six million, five hundred forty-two thousand, five hundred forty-three".