8609081640 has 64 divisors (see below), whose sum is σ = 27186580800. Its totient is φ = 2174925312.

The previous prime is 8609081627. The next prime is 8609081653. The reversal of 8609081640 is 461809068.

It is an interprime number because it is at equal distance from previous prime (8609081627) and next prime (8609081653).

It is a junction number, because it is equal to n+sod(n) for n = 8609081592 and 8609081601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1885677 + ... + 1890236.

It is an arithmetic number, because the mean of its divisors is an integer number (424790325).

Almost surely, 2^8609081640 is an apocalyptic number.

It is an amenable number.

8609081640 is an abundant number, since it is smaller than the sum of its proper divisors (18577499160).

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

8609081640 is a wasteful number, since it uses less digits than its factorization.

8609081640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775946 (or 3775942 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 8609081640 is about 92785.1369563035. The cubic root of 8609081640 is about 2049.5205414511.

The spelling of 8609081640 in words is "eight billion, six hundred nine million, eighty-one thousand, six hundred forty".