8138561448 has 16 divisors (see below), whose sum is σ = 20346403680. Its totient is φ = 2712853808.

The previous prime is 8138561443. The next prime is 8138561449. The reversal of 8138561448 is 8441658318.

It is a junction number, because it is equal to n+sod(n) for n = 8138561397 and 8138561406.

It is not an unprimeable number, because it can be changed into a prime (8138561443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169553340 + ... + 169553387.

It is an arithmetic number, because the mean of its divisors is an integer number (1271650230).

Almost surely, 2^8138561448 is an apocalyptic number.

It is an amenable number.

8138561448 is an abundant number, since it is smaller than the sum of its proper divisors (12207842232).

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

8138561448 is a wasteful number, since it uses less digits than its factorization.

8138561448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339106736 (or 339106732 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 8138561448 is about 90213.9759017415. The cubic root of 8138561448 is about 2011.4807573344.

The spelling of 8138561448 in words is "eight billion, one hundred thirty-eight million, five hundred sixty-one thousand, four hundred forty-eight".