8681372638 has 8 divisors (see below), whose sum is σ = 13023119088. Its totient is φ = 4340332944.

The previous prime is 8681372597. The next prime is 8681372653. The reversal of 8681372638 is 8362731868.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144831 + ... + 195802.

It is an arithmetic number, because the mean of its divisors is an integer number (1627889886).

Almost surely, 2^8681372638 is an apocalyptic number.

8681372638 is a deficient number, since it is larger than the sum of its proper divisors (4341746450).

8681372638 is a wasteful number, since it uses less digits than its factorization.

8681372638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353378.

The product of its digits is 2322432, while the sum is 52.

The square root of 8681372638 is about 93173.8838838438. The cubic root of 8681372638 is about 2055.2412097405.

The spelling of 8681372638 in words is "eight billion, six hundred eighty-one million, three hundred seventy-two thousand, six hundred thirty-eight".