7916449578 has 16 divisors (see below), whose sum is σ = 15834282240. Its totient is φ = 2638586016.

The previous prime is 7916449577. The next prime is 7916449601. The reversal of 7916449578 is 8759446197.

It is not an unprimeable number, because it can be changed into a prime (7916449573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26151 + ... + 128517.

It is an arithmetic number, because the mean of its divisors is an integer number (989642640).

Almost surely, 2^7916449578 is an apocalyptic number.

7916449578 is an abundant number, since it is smaller than the sum of its proper divisors (7917832662).

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

7916449578 is a wasteful number, since it uses less digits than its factorization.

7916449578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115261.

The product of its digits is 15240960, while the sum is 60.

The square root of 7916449578 is about 88974.4321589073. The cubic root of 7916449578 is about 1993.0130847644.

The spelling of 7916449578 in words is "seven billion, nine hundred sixteen million, four hundred forty-nine thousand, five hundred seventy-eight".