81609696088826 has 8 divisors (see below), whose sum is σ = 122414989767840. Its totient is φ = 40804699499548.

The previous prime is 81609696088819. The next prime is 81609696088901. The reversal of 81609696088826 is 62888069690618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73584416 + ... + 74685243.

It is an arithmetic number, because the mean of its divisors is an integer number (15301873720980).

Almost surely, 2^{81609696088826} is an apocalyptic number.

81609696088826 is a deficient number, since it is larger than the sum of its proper divisors (40805293679014).

81609696088826 is a wasteful number, since it uses less digits than its factorization.

81609696088826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148544868.

The product of its (nonzero) digits is 859963392, while the sum is 77.

The spelling of 81609696088826 in words is "eighty-one trillion, six hundred nine billion, six hundred ninety-six million, eighty-eight thousand, eight hundred twenty-six".