7521545560 has 128 divisors (see below), whose sum is σ = 18399052800. Its totient is φ = 2758694400.

The previous prime is 7521545543. The next prime is 7521545587. The reversal of 7521545560 is 655451257.

It is a super-2 number, since 2×7521545560² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4027747 + ... + 4029613.

It is an arithmetic number, because the mean of its divisors is an integer number (143742600).

Almost surely, 2^7521545560 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 7521545560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9199526400).

7521545560 is an abundant number, since it is smaller than the sum of its proper divisors (10877507240).

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

7521545560 is a wasteful number, since it uses less digits than its factorization.

7521545560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081 (or 2077 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 40.

The square root of 7521545560 is about 86726.8445177155. The cubic root of 7521545560 is about 1959.3064289023.

The spelling of 7521545560 in words is "seven billion, five hundred twenty-one million, five hundred forty-five thousand, five hundred sixty".