81497343126 has 16 divisors (see below), whose sum is σ = 162999014400. Its totient is φ = 27165059688.

The previous prime is 81497343097. The next prime is 81497343127. The reversal of 81497343126 is 62134379418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81497343127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97335 + ... + 415293.

It is an arithmetic number, because the mean of its divisors is an integer number (10187438400).

Almost surely, 2^81497343126 is an apocalyptic number.

81497343126 is an abundant number, since it is smaller than the sum of its proper divisors (81501671274).

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

81497343126 is a wasteful number, since it uses less digits than its factorization.

81497343126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360683.

The product of its digits is 870912, while the sum is 48.

The spelling of 81497343126 in words is "eighty-one billion, four hundred ninety-seven million, three hundred forty-three thousand, one hundred twenty-six".