8436643149 has 64 divisors (see below), whose sum is σ = 13020069888. Its totient is φ = 4812350400.

The previous prime is 8436643081. The next prime is 8436643151. The reversal of 8436643149 is 9413466348.

It is not a de Polignac number, because 8436643149 - 2¹² = 8436639053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8436643098 and 8436643107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8436643049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5688162 + ... + 5689644.

It is an arithmetic number, because the mean of its divisors is an integer number (203438592).

Almost surely, 2^8436643149 is an apocalyptic number.

It is an amenable number.

8436643149 is a deficient number, since it is larger than the sum of its proper divisors (4583426739).

8436643149 is a wasteful number, since it uses less digits than its factorization.

8436643149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678.

The product of its digits is 1492992, while the sum is 48.

The square root of 8436643149 is about 91851.2011298709. The cubic root of 8436643149 is about 2035.7442959962.

The spelling of 8436643149 in words is "eight billion, four hundred thirty-six million, six hundred forty-three thousand, one hundred forty-nine".