6716321520 has 160 divisors (see below), whose sum is σ = 21531121920. Its totient is φ = 1730734080.

The previous prime is 6716321519. The next prime is 6716321527. The reversal of 6716321520 is 251236176.

It is a super-2 number, since 2×6716321520² = 90217949520030220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6716321527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1049691 + ... + 1056069.

It is an arithmetic number, because the mean of its divisors is an integer number (134569512).

Almost surely, 2^6716321520 is an apocalyptic number.

6716321520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6716321520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10765560960).

6716321520 is an abundant number, since it is smaller than the sum of its proper divisors (14814800400).

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

6716321520 is a wasteful number, since it uses less digits than its factorization.

6716321520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543 (or 6537 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 6716321520 is about 81953.1666258236. The cubic root of 6716321520 is about 1886.7332050157.

Adding to 6716321520 its reverse (251236176), we get a palindrome (6967557696).

The spelling of 6716321520 in words is "six billion, seven hundred sixteen million, three hundred twenty-one thousand, five hundred twenty".