7128045075440 has 120 divisors (see below), whose sum is σ = 17693198687808. Its totient is φ = 2669224645120.

The previous prime is 7128045075433. The next prime is 7128045075469. The reversal of 7128045075440 is 445705408217.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197210 + ... + 3780870.

Almost surely, 2^{7128045075440} 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 7128045075440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8846599343904).

7128045075440 is an abundant number, since it is smaller than the sum of its proper divisors (10565153612368).

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

7128045075440 is a wasteful number, since it uses less digits than its factorization.

7128045075440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583767 (or 3583738 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 47.

The spelling of 7128045075440 in words is "seven trillion, one hundred twenty-eight billion, forty-five million, seventy-five thousand, four hundred forty".