38818246640 has 40 divisors (see below), whose sum is σ = 90264931008. Its totient is φ = 15525146880.

The previous prime is 38818246613. The next prime is 38818246651. The reversal of 38818246640 is 4664281883.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628169 + ... + 687191.

Almost surely, 2^38818246640 is an apocalyptic number.

It is an amenable number.

38818246640 is an abundant number, since it is smaller than the sum of its proper divisors (51446684368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38818246640 is a wasteful number, since it uses less digits than its factorization.

38818246640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67257 (or 67251 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 50.

The spelling of 38818246640 in words is "thirty-eight billion, eight hundred eighteen million, two hundred forty-six thousand, six hundred forty".