8127664131 has 4 divisors (see below), whose sum is σ = 10836885512. Its totient is φ = 5418442752.

The previous prime is 8127664037. The next prime is 8127664133. The reversal of 8127664131 is 1314667218.

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

It is not a de Polignac number, because 8127664131 - 2¹⁸ = 8127401987 is a prime.

It is a super-2 number, since 2×8127664131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8127664131.

It is not an unprimeable number, because it can be changed into a prime (8127664133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354610686 + ... + 1354610691.

It is an arithmetic number, because the mean of its divisors is an integer number (2709221378).

Almost surely, 2^8127664131 is an apocalyptic number.

8127664131 is a deficient number, since it is larger than the sum of its proper divisors (2709221381).

8127664131 is a wasteful number, since it uses less digits than its factorization.

8127664131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709221380.

The product of its digits is 48384, while the sum is 39.

The square root of 8127664131 is about 90153.5586152871. The cubic root of 8127664131 is about 2010.5825832859.

The spelling of 8127664131 in words is "eight billion, one hundred twenty-seven million, six hundred sixty-four thousand, one hundred thirty-one".