7999436544 has 432 divisors, whose sum is σ = 25493618304. Its totient is φ = 2206310400.

The previous prime is 7999436537. The next prime is 7999436567. The reversal of 7999436544 is 4456349997.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131138274 + ... + 131138334.

Almost surely, 2^7999436544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7999436544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12746809152).

7999436544 is an abundant number, since it is smaller than the sum of its proper divisors (17494181760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7999436544 is a wasteful number, since it uses less digits than its factorization.

7999436544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 139 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 60.

The square root of 7999436544 is about 89439.5692297319. The cubic root of 7999436544 is about 1999.9530442309.

The spelling of 7999436544 in words is "seven billion, nine hundred ninety-nine million, four hundred thirty-six thousand, five hundred forty-four".