8493644157 has 32 divisors (see below), whose sum is σ = 12142694400. Its totient is φ = 5265404352.

The previous prime is 8493644153. The next prime is 8493644177. The reversal of 8493644157 is 7514463948.

It is a happy number.

It is not a de Polignac number, because 8493644157 - 2² = 8493644153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8493644153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773568 + ... + 784470.

It is an arithmetic number, because the mean of its divisors is an integer number (379459200).

Almost surely, 2^8493644157 is an apocalyptic number.

It is an amenable number.

8493644157 is a deficient number, since it is larger than the sum of its proper divisors (3649050243).

8493644157 is a wasteful number, since it uses less digits than its factorization.

8493644157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11177.

The product of its digits is 2903040, while the sum is 51.

The square root of 8493644157 is about 92160.9687286326. The cubic root of 8493644157 is about 2040.3187504137.

The spelling of 8493644157 in words is "eight billion, four hundred ninety-three million, six hundred forty-four thousand, one hundred fifty-seven".