7831278660 has 96 divisors (see below), whose sum is σ = 22564886400. Its totient is φ = 2027870208.

The previous prime is 7831278649. The next prime is 7831278691. The reversal of 7831278660 is 668721387.

It is a super-2 number, since 2×7831278660² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1211116 + ... + 1217564.

It is an arithmetic number, because the mean of its divisors is an integer number (235050900).

Almost surely, 2^7831278660 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 7831278660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11282443200).

7831278660 is an abundant number, since it is smaller than the sum of its proper divisors (14733607740).

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

7831278660 is a wasteful number, since it uses less digits than its factorization.

7831278660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045 (or 7043 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 7831278660 is about 88494.5120332329. The cubic root of 7831278660 is about 1985.8398702999.

The spelling of 7831278660 in words is "seven billion, eight hundred thirty-one million, two hundred seventy-eight thousand, six hundred sixty".