8421896645 has 16 divisors (see below), whose sum is σ = 10710724608. Its totient is φ = 6335289600.

The previous prime is 8421896629. The next prime is 8421896647. The reversal of 8421896645 is 5466981248.

It is not a de Polignac number, because 8421896645 - 2⁴ = 8421896629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421896647) 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 15 ways as a sum of consecutive naturals, for example, 46820 + ... + 137970.

It is an arithmetic number, because the mean of its divisors is an integer number (669420288).

Almost surely, 2^8421896645 is an apocalyptic number.

8421896645 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8421896645 is a deficient number, since it is larger than the sum of its proper divisors (2288827963).

8421896645 is a wasteful number, since it uses less digits than its factorization.

8421896645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92260.

The product of its digits is 3317760, while the sum is 53.

The square root of 8421896645 is about 91770.8921445139. The cubic root of 8421896645 is about 2034.5575040969.

The spelling of 8421896645 in words is "eight billion, four hundred twenty-one million, eight hundred ninety-six thousand, six hundred forty-five".