6715781280 has 672 divisors, whose sum is σ = 26468297856. Its totient is φ = 1598994432.

The previous prime is 6715781279. The next prime is 6715781327. The reversal of 6715781280 is 821875176.

It is a happy number.

6715781280 is a `hidden beast` number, since 6 + 71 + 578 + 1 + 2 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 111 ways as a sum of consecutive naturals, for example, 65201709 + ... + 65201811.

It is an arithmetic number, because the mean of its divisors is an integer number (39387348).

Almost surely, 2^6715781280 is an apocalyptic number.

6715781280 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 6715781280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13234148928).

6715781280 is an abundant number, since it is smaller than the sum of its proper divisors (19752516576).

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

6715781280 is a wasteful number, since it uses less digits than its factorization.

6715781280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The square root of 6715781280 is about 81949.8705307092. The cubic root of 6715781280 is about 1886.6826160103.

The spelling of 6715781280 in words is "six billion, seven hundred fifteen million, seven hundred eighty-one thousand, two hundred eighty".