6979355640 has 192 divisors, whose sum is σ = 23032900800. Its totient is φ = 1832656896.

The previous prime is 6979355623. The next prime is 6979355651. The reversal of 6979355640 is 465539796.

6979355640 is a `hidden beast` number, since 6 + 9 + 79 + 3 + 5 + 564 + 0 = 666.

It is a super-2 number, since 2×6979355640² = 97422810299199619200, which contains 22 as substring.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 9393109 + ... + 9393851.

It is an arithmetic number, because the mean of its divisors is an integer number (119963025).

Almost surely, 2^6979355640 is an apocalyptic number.

6979355640 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 6979355640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11516450400).

6979355640 is an abundant number, since it is smaller than the sum of its proper divisors (16053545160).

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

6979355640 is a wasteful number, since it uses less digits than its factorization.

6979355640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 54.

The square root of 6979355640 is about 83542.5379073439. The cubic root of 6979355640 is about 1911.0487958118.

The spelling of 6979355640 in words is "six billion, nine hundred seventy-nine million, three hundred fifty-five thousand, six hundred forty".