81510324131266 has 16 divisors (see below), whose sum is σ = 135086163778944. Its totient is φ = 36690069173824.

The previous prime is 81510324131231. The next prime is 81510324131281. The reversal of 81510324131266 is 66213142301518.

It is a super-3 number, since 3×81510324131266³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52116574750 + ... + 52116576313.

It is an arithmetic number, because the mean of its divisors is an integer number (8442885236184).

Almost surely, 2^{81510324131266} is an apocalyptic number.

81510324131266 is a deficient number, since it is larger than the sum of its proper divisors (53575839647678).

81510324131266 is a wasteful number, since it uses less digits than its factorization.

81510324131266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104233151105.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 81510324131266 in words is "eighty-one trillion, five hundred ten billion, three hundred twenty-four million, one hundred thirty-one thousand, two hundred sixty-six".