8185561340 has 24 divisors (see below), whose sum is σ = 18752377392. Its totient is φ = 2976567680.

The previous prime is 8185561339. The next prime is 8185561367. The reversal of 8185561340 is 431655818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18603329 + ... + 18603768.

It is an arithmetic number, because the mean of its divisors is an integer number (781349058).

Almost surely, 2^8185561340 is an apocalyptic number.

It is an amenable number.

8185561340 is an abundant number, since it is smaller than the sum of its proper divisors (10566816052).

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

8185561340 is a wasteful number, since it uses less digits than its factorization.

8185561340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37207117 (or 37207115 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 8185561340 is about 90474.0920927091. The cubic root of 8185561340 is about 2015.3454031710.

The spelling of 8185561340 in words is "eight billion, one hundred eighty-five million, five hundred sixty-one thousand, three hundred forty".