7525355640 has 256 divisors, whose sum is σ = 25075353600. Its totient is φ = 1791590400.

The previous prime is 7525355639. The next prime is 7525355681. The reversal of 7525355640 is 465535257.

It is a junction number, because it is equal to n+sod(n) for n = 7525355592 and 7525355601.

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, 27768705 + ... + 27768975.

It is an arithmetic number, because the mean of its divisors is an integer number (97950600).

Almost surely, 2^7525355640 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 7525355640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12537676800).

7525355640 is an abundant number, since it is smaller than the sum of its proper divisors (17549997960).

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

7525355640 is a wasteful number, since it uses less digits than its factorization.

7525355640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 42.

The square root of 7525355640 is about 86748.8077151496. The cubic root of 7525355640 is about 1959.6372055153.

The spelling of 7525355640 in words is "seven billion, five hundred twenty-five million, three hundred fifty-five thousand, six hundred forty".