38821680997 has 8 divisors (see below), whose sum is σ = 42363195840. Its totient is φ = 35282211360.

The previous prime is 38821680941. The next prime is 38821681001. The reversal of 38821680997 is 79908612883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38821680997 - 2²³ = 38813292389 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 (38821680907) 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, 471472 + ... + 547657.

It is an arithmetic number, because the mean of its divisors is an integer number (5295399480).

Almost surely, 2^38821680997 is an apocalyptic number.

It is an amenable number.

38821680997 is a deficient number, since it is larger than the sum of its proper divisors (3541514843).

38821680997 is a wasteful number, since it uses less digits than its factorization.

38821680997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022603.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 38821680997 in words is "thirty-eight billion, eight hundred twenty-one million, six hundred eighty thousand, nine hundred ninety-seven".