7317391872 has 640 divisors, whose sum is σ = 25926912000. Its totient is φ = 1820786688.

The previous prime is 7317391831. The next prime is 7317391877. The reversal of 7317391872 is 2781937137.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (7317391877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 170171883 + ... + 170171925.

It is an arithmetic number, because the mean of its divisors is an integer number (40510800).

Almost surely, 2^7317391872 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 7317391872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12963456000).

7317391872 is an abundant number, since it is smaller than the sum of its proper divisors (18609520128).

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

7317391872 is a wasteful number, since it uses less digits than its factorization.

7317391872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 91 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The square root of 7317391872 is about 85541.7551374766. The cubic root of 7317391872 is about 1941.4167452655.

The spelling of 7317391872 in words is "seven billion, three hundred seventeen million, three hundred ninety-one thousand, eight hundred seventy-two".