81736126 has 4 divisors (see below), whose sum is σ = 122604192. Its totient is φ = 40868062.

The previous prime is 81736121. The next prime is 81736139. The reversal of 81736126 is 62163718.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62163718 = 2 ⋅31081859.

It is a junction number, because it is equal to n+sod(n) for n = 81736091 and 81736100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81736121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20434030 + ... + 20434033.

It is an arithmetic number, because the mean of its divisors is an integer number (30651048).

Almost surely, 2^81736126 is an apocalyptic number.

81736126 is a deficient number, since it is larger than the sum of its proper divisors (40868066).

81736126 is a wasteful number, since it uses less digits than its factorization.

81736126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40868065.

The product of its digits is 12096, while the sum is 34.

The square root of 81736126 is about 9040.8033935044. The cubic root of 81736126 is about 433.9816332916.

The spelling of 81736126 in words is "eighty-one million, seven hundred thirty-six thousand, one hundred twenty-six".