7945521448 has 8 divisors (see below), whose sum is σ = 14897852730. Its totient is φ = 3972760720.

The previous prime is 7945521439. The next prime is 7945521449. The reversal of 7945521448 is 8441255497.

It can be written as a sum of positive squares in only one way, i.e., 4827192484 + 3118328964 = 69478^2 + 55842^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×7945521448² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7945521449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496595083 + ... + 496595098.

Almost surely, 2^7945521448 is an apocalyptic number.

It is an amenable number.

7945521448 is a deficient number, since it is larger than the sum of its proper divisors (6952331282).

7945521448 is a wasteful number, since it uses less digits than its factorization.

7945521448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993190187 (or 993190183 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 49.

The square root of 7945521448 is about 89137.6544901199. The cubic root of 7945521448 is about 1995.4497762494.

The spelling of 7945521448 in words is "seven billion, nine hundred forty-five million, five hundred twenty-one thousand, four hundred forty-eight".