6861840130 has 16 divisors (see below), whose sum is σ = 12520509624. Its totient is φ = 2707136640.

The previous prime is 6861840127. The next prime is 6861840131. The reversal of 6861840130 is 310481686.

It can be written as a sum of positive squares in 4 ways, for example, as 6677668089 + 184172041 = 81717^2 + 13571^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6861840130.

It is not an unprimeable number, because it can be changed into a prime (6861840131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4699161 + ... + 4700620.

Almost surely, 2^6861840130 is an apocalyptic number.

6861840130 is a deficient number, since it is larger than the sum of its proper divisors (5658669494).

6861840130 is a wasteful number, since it uses less digits than its factorization.

6861840130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9399861.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 6861840130 is about 82836.2247449749. The cubic root of 6861840130 is about 1900.2622103493.

The spelling of 6861840130 in words is "six billion, eight hundred sixty-one million, eight hundred forty thousand, one hundred thirty".