8315421944 has 16 divisors (see below), whose sum is σ = 15636353400. Its totient is φ = 4145727712.

The previous prime is 8315421943. The next prime is 8315422021. The reversal of 8315421944 is 4491245138.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8315421941) 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, 1494959 + ... + 1500510.

Almost surely, 2^8315421944 is an apocalyptic number.

It is an amenable number.

8315421944 is a deficient number, since it is larger than the sum of its proper divisors (7320931456).

8315421944 is a wasteful number, since it uses less digits than its factorization.

8315421944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995822 (or 2995818 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 8315421944 is about 91188.9354253026. The cubic root of 8315421944 is about 2025.9470807585.

The spelling of 8315421944 in words is "eight billion, three hundred fifteen million, four hundred twenty-one thousand, nine hundred forty-four".