8157218914109 has 8 divisors (see below), whose sum is σ = 8378020789248. Its totient is φ = 7936434749520.

The previous prime is 8157218914069. The next prime is 8157218914129. The reversal of 8157218914109 is 9014198127518.

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 8157218914109 - 2¹² = 8157218910013 is a prime.

It is a super-2 number, since 2×8157218914109² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8157218914129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3491357 + ... + 5338914.

It is an arithmetic number, because the mean of its divisors is an integer number (1047252598656).

Almost surely, 2^{8157218914109} is an apocalyptic number.

It is an amenable number.

8157218914109 is a deficient number, since it is larger than the sum of its proper divisors (220801875139).

8157218914109 is a wasteful number, since it uses less digits than its factorization.

8157218914109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8855275.

The product of its (nonzero) digits is 1451520, while the sum is 56.

The spelling of 8157218914109 in words is "eight trillion, one hundred fifty-seven billion, two hundred eighteen million, nine hundred fourteen thousand, one hundred nine".