8126681539 has 4 divisors (see below), whose sum is σ = 8554401640. Its totient is φ = 7698961440.

The previous prime is 8126681483. The next prime is 8126681567. The reversal of 8126681539 is 9351866218.

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

It is a cyclic number.

It is not a de Polignac number, because 8126681539 - 2²¹ = 8124584387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8126681492 and 8126681501.

It is not an unprimeable number, because it can be changed into a prime (8126681579) 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, 213860022 + ... + 213860059.

It is an arithmetic number, because the mean of its divisors is an integer number (2138600410).

Almost surely, 2^8126681539 is an apocalyptic number.

8126681539 is a deficient number, since it is larger than the sum of its proper divisors (427720101).

8126681539 is a wasteful number, since it uses less digits than its factorization.

8126681539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427720100.

The product of its digits is 622080, while the sum is 49.

The square root of 8126681539 is about 90148.1089041806. The cubic root of 8126681539 is about 2010.5015570547.

The spelling of 8126681539 in words is "eight billion, one hundred twenty-six million, six hundred eighty-one thousand, five hundred thirty-nine".