38281221778 has 16 divisors (see below), whose sum is σ = 57635627616. Its totient is φ = 19069427520.

The previous prime is 38281221757. The next prime is 38281221779. The reversal of 38281221778 is 87712218283.

It is a happy number.

38281221778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (38281221779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962250 + ... + 1001242.

It is an arithmetic number, because the mean of its divisors is an integer number (3602226726).

Almost surely, 2^38281221778 is an apocalyptic number.

38281221778 is a deficient number, since it is larger than the sum of its proper divisors (19354405838).

38281221778 is a wasteful number, since it uses less digits than its factorization.

38281221778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40809.

The product of its digits is 602112, while the sum is 49.

The spelling of 38281221778 in words is "thirty-eight billion, two hundred eighty-one million, two hundred twenty-one thousand, seven hundred seventy-eight".