7522378380 has 144 divisors (see below), whose sum is σ = 25023817728. Its totient is φ = 1813968000.

The previous prime is 7522378379. The next prime is 7522378417. The reversal of 7522378380 is 838732257.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368235 + ... + 388125.

It is an arithmetic number, because the mean of its divisors is an integer number (173776512).

Almost surely, 2^7522378380 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 7522378380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12511908864).

7522378380 is an abundant number, since it is smaller than the sum of its proper divisors (17501439348).

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

7522378380 is a wasteful number, since it uses less digits than its factorization.

7522378380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20108 (or 20103 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 7522378380 is about 86731.6457816869. The cubic root of 7522378380 is about 1959.3787406963.

The spelling of 7522378380 in words is "seven billion, five hundred twenty-two million, three hundred seventy-eight thousand, three hundred eighty".