8638166317751 has 4 divisors (see below), whose sum is σ = 8656904206104. Its totient is φ = 8619428429400.

The previous prime is 8638166317733. The next prime is 8638166317783. The reversal of 8638166317751 is 1577136618368.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8638166317751 - 2³⁴ = 8620986448567 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 (8638166317051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9368943485 + ... + 9368944406.

It is an arithmetic number, because the mean of its divisors is an integer number (2164226051526).

Almost surely, 2^{8638166317751} is an apocalyptic number.

8638166317751 is a deficient number, since it is larger than the sum of its proper divisors (18737888353).

8638166317751 is a wasteful number, since it uses less digits than its factorization.

8638166317751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18737888352.

The product of its digits is 30481920, while the sum is 62.

The spelling of 8638166317751 in words is "eight trillion, six hundred thirty-eight billion, one hundred sixty-six million, three hundred seventeen thousand, seven hundred fifty-one".