7128188067840 has 448 divisors, whose sum is σ = 26434581258240. Its totient is φ = 1606338478080.

The previous prime is 7128188067799. The next prime is 7128188067851. The reversal of 7128188067840 is 487608818217.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×7128188067840² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61013001 + ... + 61129719.

Almost surely, 2^{7128188067840} is an apocalyptic number.

7128188067840 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 7128188067840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13217290629120).

7128188067840 is an abundant number, since it is smaller than the sum of its proper divisors (19306393190400).

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

7128188067840 is a wasteful number, since it uses less digits than its factorization.

7128188067840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116831 (or 116807 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 60.

The spelling of 7128188067840 in words is "seven trillion, one hundred twenty-eight billion, one hundred eighty-eight million, sixty-seven thousand, eight hundred forty".