81126434576526 has 32 divisors (see below), whose sum is σ = 164541561712128. Its totient is φ = 26660712029280.

The previous prime is 81126434576431. The next prime is 81126434576549. The reversal of 81126434576526 is 62567543462118.

It is a self number, because there is not a number n which added to its sum of digits gives 81126434576526.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18654336 + ... + 22588428.

It is an arithmetic number, because the mean of its divisors is an integer number (5141923803504).

Almost surely, 2^{81126434576526} is an apocalyptic number.

81126434576526 is an abundant number, since it is smaller than the sum of its proper divisors (83415127135602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81126434576526 is a wasteful number, since it uses less digits than its factorization.

81126434576526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982576.

The product of its digits is 58060800, while the sum is 60.

The spelling of 81126434576526 in words is "eighty-one trillion, one hundred twenty-six billion, four hundred thirty-four million, five hundred seventy-six thousand, five hundred twenty-six".