6526381081 has 4 divisors (see below), whose sum is σ = 7119688464. Its totient is φ = 5933073700.

The previous prime is 6526381021. The next prime is 6526381087. The reversal of 6526381081 is 1801836256.

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 6526381081 - 2²³ = 6517992473 is a prime.

It is a super-2 number, since 2×6526381081² = 85187300028869457122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6526381087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296653675 + ... + 296653696.

It is an arithmetic number, because the mean of its divisors is an integer number (1779922116).

Almost surely, 2^6526381081 is an apocalyptic number.

It is an amenable number.

6526381081 is a deficient number, since it is larger than the sum of its proper divisors (593307383).

6526381081 is a wasteful number, since it uses less digits than its factorization.

6526381081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593307382.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 6526381081 is about 80786.0203314905. The cubic root of 6526381081 is about 1868.7769826180.

The spelling of 6526381081 in words is "six billion, five hundred twenty-six million, three hundred eighty-one thousand, eighty-one".