8047561878 has 12 divisors (see below), whose sum is σ = 17436384108. Its totient is φ = 2682520620.

The previous prime is 8047561871. The next prime is 8047561889. The reversal of 8047561878 is 8781657408.

It is a happy number.

8047561878 is a `hidden beast` number, since 8 + 0 + 4 + 7 + 561 + 8 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8047561871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 223543368 + ... + 223543403.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032009).

Almost surely, 2^8047561878 is an apocalyptic number.

8047561878 is an abundant number, since it is smaller than the sum of its proper divisors (9388822230).

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

8047561878 is a wasteful number, since it uses less digits than its factorization.

8047561878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447086779 (or 447086776 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The square root of 8047561878 is about 89708.2040729832. The cubic root of 8047561878 is about 2003.9556610482.

The spelling of 8047561878 in words is "eight billion, forty-seven million, five hundred sixty-one thousand, eight hundred seventy-eight".