7726510081 has 12 divisors (see below), whose sum is σ = 8253148540. Its totient is φ = 7231783680.

The previous prime is 7726510069. The next prime is 7726510111. The reversal of 7726510081 is 1800156277.

It can be written as a sum of positive squares in 6 ways, for example, as 276058225 + 7450451856 = 16615^2 + 86316^2 .

It is not a de Polignac number, because 7726510081 - 2⁹ = 7726509569 is a prime.

It is a super-2 number, since 2×7726510081² (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 7726510081.

It is not an unprimeable number, because it can be changed into a prime (7726510061) 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 11 ways as a sum of consecutive naturals, for example, 21546 + ... + 126163.

Almost surely, 2^7726510081 is an apocalyptic number.

It is an amenable number.

7726510081 is a deficient number, since it is larger than the sum of its proper divisors (526638459).

7726510081 is a wasteful number, since it uses less digits than its factorization.

7726510081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147924 (or 147907 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 7726510081 is about 87900.5692871212. The cubic root of 7726510081 is about 1976.9444146954.

The spelling of 7726510081 in words is "seven billion, seven hundred twenty-six million, five hundred ten thousand, eighty-one".