7317721372 has 12 divisors (see below), whose sum is σ = 13791090376. Its totient is φ = 3377409840.

The previous prime is 7317721363. The next prime is 7317721379. The reversal of 7317721372 is 2731277137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7317721379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70362654 + ... + 70362757.

Almost surely, 2^7317721372 is an apocalyptic number.

It is an amenable number.

7317721372 is a deficient number, since it is larger than the sum of its proper divisors (6473369004).

7317721372 is a wasteful number, since it uses less digits than its factorization.

7317721372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140725428 (or 140725426 counting only the distinct ones).

The product of its digits is 86436, while the sum is 40.

The square root of 7317721372 is about 85543.6810758106. The cubic root of 7317721372 is about 1941.4458853028.

It can be divided in two parts, 73177 and 21372, that added together give a palindrome (94549).

The spelling of 7317721372 in words is "seven billion, three hundred seventeen million, seven hundred twenty-one thousand, three hundred seventy-two".