81729266099596 has 12 divisors (see below), whose sum is σ = 143051570476360. Its totient is φ = 40857388820640.

The previous prime is 81729266099531. The next prime is 81729266099597. The reversal of 81729266099596 is 69599066292718.

It is not an unprimeable number, because it can be changed into a prime (81729266099597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811031906 + ... + 1811077033.

Almost surely, 2^{81729266099596} is an apocalyptic number.

It is an amenable number.

81729266099596 is a deficient number, since it is larger than the sum of its proper divisors (61322304376764).

81729266099596 is a wasteful number, since it uses less digits than its factorization.

81729266099596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622114584 (or 3622114582 counting only the distinct ones).

The product of its (nonzero) digits is 1587237120, while the sum is 79.

The spelling of 81729266099596 in words is "eighty-one trillion, seven hundred twenty-nine billion, two hundred sixty-six million, ninety-nine thousand, five hundred ninety-six".