2186847341640 has 384 divisors, whose sum is σ = 8301874744800. Its totient is φ = 494278410240.

The previous prime is 2186847341629. The next prime is 2186847341647. The reversal of 2186847341640 is 461437486812.

2186847341640 is a `hidden beast` number, since 2 + 1 + 8 + 6 + 8 + 473 + 4 + 164 + 0 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 76504240836 + 2110343100804 = 276594^2 + 1452702^2 .

It is not an unprimeable number, because it can be changed into a prime (2186847341647) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2926756 + ... + 3597164.

Almost surely, 2^{2186847341640} is an apocalyptic number.

2186847341640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2186847341640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4150937372400).

2186847341640 is an abundant number, since it is smaller than the sum of its proper divisors (6115027403160).

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

2186847341640 is a wasteful number, since it uses less digits than its factorization.

2186847341640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670497 (or 670490 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 2186847341640 in words is "two trillion, one hundred eighty-six billion, eight hundred forty-seven million, three hundred forty-one thousand, six hundred forty".