7123665725680 has 320 divisors, whose sum is σ = 19556082616320. Its totient is φ = 2363003596800.

The previous prime is 7123665725647. The next prime is 7123665725711. The reversal of 7123665725680 is 865275663217.

It is a happy number.

It is a super-2 number, since 2×7123665725680² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 716589510 + ... + 716599450.

It is an arithmetic number, because the mean of its divisors is an integer number (61112758176).

Almost surely, 2^{7123665725680} is an apocalyptic number.

7123665725680 is a gapful number since it is divisible by the number (70) 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 7123665725680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9778041308160).

7123665725680 is an abundant number, since it is smaller than the sum of its proper divisors (12432416890640).

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

7123665725680 is a wasteful number, since it uses less digits than its factorization.

7123665725680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368 (or 10362 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 7123665725680 in words is "seven trillion, one hundred twenty-three billion, six hundred sixty-five million, seven hundred twenty-five thousand, six hundred eighty".