38688978766 has 4 divisors (see below), whose sum is σ = 58033468152. Its totient is φ = 19344489382.

The previous prime is 38688978739. The next prime is 38688978773. The reversal of 38688978766 is 66787988683.

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

It is a junction number, because it is equal to n+sod(n) for n = 38688978692 and 38688978701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9672244690 + ... + 9672244693.

It is an arithmetic number, because the mean of its divisors is an integer number (14508367038).

Almost surely, 2^38688978766 is an apocalyptic number.

38688978766 is a deficient number, since it is larger than the sum of its proper divisors (19344489386).

38688978766 is a wasteful number, since it uses less digits than its factorization.

38688978766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19344489385.

The product of its digits is 1170505728, while the sum is 76.

The spelling of 38688978766 in words is "thirty-eight billion, six hundred eighty-eight million, nine hundred seventy-eight thousand, seven hundred sixty-six".