8185037640 has 128 divisors (see below), whose sum is σ = 26530035840. Its totient is φ = 2008221696.

The previous prime is 8185037611. The next prime is 8185037699. The reversal of 8185037640 is 467305818.

It is a junction number, because it is equal to n+sod(n) for n = 8185037592 and 8185037601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479899 + ... + 496661.

It is an arithmetic number, because the mean of its divisors is an integer number (207265905).

Almost surely, 2^8185037640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8185037640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13265017920).

8185037640 is an abundant number, since it is smaller than the sum of its proper divisors (18344998200).

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

8185037640 is a wasteful number, since it uses less digits than its factorization.

8185037640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17103 (or 17099 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 8185037640 is about 90471.1978477128. The cubic root of 8185037640 is about 2015.3024226572.

The spelling of 8185037640 in words is "eight billion, one hundred eighty-five million, thirty-seven thousand, six hundred forty".