8561378433860 has 96 divisors (see below), whose sum is σ = 21692928042240. Its totient is φ = 2772586672128.

The previous prime is 8561378433809. The next prime is 8561378433889. The reversal of 8561378433860 is 683348731658.

It is a junction number, because it is equal to n+sod(n) for n = 8561378433793 and 8561378433802.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3878897 + ... + 5671736.

It is an arithmetic number, because the mean of its divisors is an integer number (225968000440).

Almost surely, 2^{8561378433860} is an apocalyptic number.

It is an amenable number.

8561378433860 is an abundant number, since it is smaller than the sum of its proper divisors (13131549608380).

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

8561378433860 is a wasteful number, since it uses less digits than its factorization.

8561378433860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9551005 (or 9551003 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 62.

The spelling of 8561378433860 in words is "eight trillion, five hundred sixty-one billion, three hundred seventy-eight million, four hundred thirty-three thousand, eight hundred sixty".