8381491662872 has 32 divisors (see below), whose sum is σ = 15740185809600. Its totient is φ = 4184109456384.

The previous prime is 8381491662871. The next prime is 8381491662877. The reversal of 8381491662872 is 2782661941838.

It is a junction number, because it is equal to n+sod(n) for n = 8381491662799 and 8381491662808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381491662871) 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, 154274129 + ... + 154328447.

It is an arithmetic number, because the mean of its divisors is an integer number (491880806550).

Almost surely, 2^{8381491662872} is an apocalyptic number.

It is an amenable number.

8381491662872 is a deficient number, since it is larger than the sum of its proper divisors (7358694146728).

8381491662872 is a wasteful number, since it uses less digits than its factorization.

8381491662872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84515 (or 84511 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 65.

The spelling of 8381491662872 in words is "eight trillion, three hundred eighty-one billion, four hundred ninety-one million, six hundred sixty-two thousand, eight hundred seventy-two".