8397739625221 has 8 divisors (see below), whose sum is σ = 8701207673760. Its totient is φ = 8099642692752.

The previous prime is 8397739625213. The next prime is 8397739625257. The reversal of 8397739625221 is 1225269377938.

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

It is a cyclic number.

It is not a de Polignac number, because 8397739625221 - 2³ = 8397739625213 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 (8397739625201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342775835 + ... + 1342782088.

It is an arithmetic number, because the mean of its divisors is an integer number (1087650959220).

Almost surely, 2^{8397739625221} is an apocalyptic number.

It is an amenable number.

8397739625221 is a deficient number, since it is larger than the sum of its proper divisors (303468048539).

8397739625221 is a wasteful number, since it uses less digits than its factorization.

8397739625221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685558035.

The product of its digits is 68584320, while the sum is 64.

The spelling of 8397739625221 in words is "eight trillion, three hundred ninety-seven billion, seven hundred thirty-nine million, six hundred twenty-five thousand, two hundred twenty-one".