6371720516 has 24 divisors (see below), whose sum is σ = 12814643520. Its totient is φ = 2715479712.

The previous prime is 6371720507. The next prime is 6371720519. The reversal of 6371720516 is 6150271736.

It is a self number, because there is not a number n which added to its sum of digits gives 6371720516.

It is not an unprimeable number, because it can be changed into a prime (6371720519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630635 + ... + 640658.

It is an arithmetic number, because the mean of its divisors is an integer number (533943480).

Almost surely, 2^6371720516 is an apocalyptic number.

It is an amenable number.

6371720516 is an abundant number, since it is smaller than the sum of its proper divisors (6442923004).

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

6371720516 is a wasteful number, since it uses less digits than its factorization.

6371720516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271483 (or 1271481 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 6371720516 is about 79823.0575460499. The cubic root of 6371720516 is about 1853.8968762112.

The spelling of 6371720516 in words is "six billion, three hundred seventy-one million, seven hundred twenty thousand, five hundred sixteen".