8126681501 has 4 divisors (see below), whose sum is σ = 8554401600. Its totient is φ = 7698961404.

The previous prime is 8126681483. The next prime is 8126681567. The reversal of 8126681501 is 1051866218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8126681501 - 2¹⁴ = 8126665117 is a prime.

It is a super-2 number, since 2×8126681501² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8126681201) 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 3 ways as a sum of consecutive naturals, for example, 213860021 + ... + 213860058.

It is an arithmetic number, because the mean of its divisors is an integer number (2138600400).

Almost surely, 2^8126681501 is an apocalyptic number.

It is an amenable number.

8126681501 is a deficient number, since it is larger than the sum of its proper divisors (427720099).

8126681501 is a wasteful number, since it uses less digits than its factorization.

8126681501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427720098.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 8126681501 is about 90148.1086934163. The cubic root of 8126681501 is about 2010.5015539210.

The spelling of 8126681501 in words is "eight billion, one hundred twenty-six million, six hundred eighty-one thousand, five hundred one".