8130671861 has 4 divisors (see below), whose sum is σ = 8756108172. Its totient is φ = 7505235552.

The previous prime is 8130671831. The next prime is 8130671867. The reversal of 8130671861 is 1681760318.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2087941636 + 6042730225 = 45694^2 + 77735^2 .

It is a cyclic number.

It is not a de Polignac number, because 8130671861 - 2¹⁰ = 8130670837 is a prime.

It is a super-2 number, since 2×8130671861² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8130671867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312718136 + ... + 312718161.

It is an arithmetic number, because the mean of its divisors is an integer number (2189027043).

Almost surely, 2^8130671861 is an apocalyptic number.

It is an amenable number.

8130671861 is a deficient number, since it is larger than the sum of its proper divisors (625436311).

8130671861 is a wasteful number, since it uses less digits than its factorization.

8130671861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625436310.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 8130671861 is about 90170.2382219322. The cubic root of 8130671861 is about 2010.8305653077.

The spelling of 8130671861 in words is "eight billion, one hundred thirty million, six hundred seventy-one thousand, eight hundred sixty-one".