8000137861 has 8 divisors (see below), whose sum is σ = 8135943800. Its totient is φ = 7864482240.

The previous prime is 8000137843. The next prime is 8000137903. The reversal of 8000137861 is 1687310008.

It can be written as a sum of positive squares in 4 ways, for example, as 174081636 + 7826056225 = 13194^2 + 88465^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8000137861 - 2⁵ = 8000137829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8000137811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72475 + ... + 145783.

It is an arithmetic number, because the mean of its divisors is an integer number (1016992975).

Almost surely, 2^8000137861 is an apocalyptic number.

It is an amenable number.

8000137861 is a deficient number, since it is larger than the sum of its proper divisors (135805939).

8000137861 is a wasteful number, since it uses less digits than its factorization.

8000137861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75159.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 8000137861 is about 89443.4897630901. The cubic root of 8000137861 is about 2000.0114883507.

Adding to 8000137861 its reverse (1687310008), we get a palindrome (9687447869).

The spelling of 8000137861 in words is "eight billion, one hundred thirty-seven thousand, eight hundred sixty-one".