8693218157 has 4 divisors (see below), whose sum is σ = 9361927260. Its totient is φ = 8024509056.

The previous prime is 8693218091. The next prime is 8693218159. The reversal of 8693218157 is 7518123968.

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

It can be written as a sum of positive squares in 2 ways, for example, as 886788841 + 7806429316 = 29779^2 + 88354^2 .

It is a cyclic number.

It is not a de Polignac number, because 8693218157 - 2¹⁶ = 8693152621 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 (8693218159) by changing a digit.

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, 334354532 + ... + 334354557.

It is an arithmetic number, because the mean of its divisors is an integer number (2340481815).

Almost surely, 2^8693218157 is an apocalyptic number.

It is an amenable number.

8693218157 is a deficient number, since it is larger than the sum of its proper divisors (668709103).

8693218157 is a wasteful number, since it uses less digits than its factorization.

8693218157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668709102.

The product of its digits is 725760, while the sum is 50.

The square root of 8693218157 is about 93237.4289488937. The cubic root of 8693218157 is about 2056.1755602287.

The spelling of 8693218157 in words is "eight billion, six hundred ninety-three million, two hundred eighteen thousand, one hundred fifty-seven".