81789506296 has 16 divisors (see below), whose sum is σ = 156248821800. Its totient is φ = 40123153824.

The previous prime is 81789506273. The next prime is 81789506299. The reversal of 81789506296 is 69260598718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81789506299) 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, 96449466 + ... + 96450313.

Almost surely, 2^81789506296 is an apocalyptic number.

It is an amenable number.

81789506296 is a deficient number, since it is larger than the sum of its proper divisors (74459315504).

81789506296 is a wasteful number, since it uses less digits than its factorization.

81789506296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192899838 (or 192899834 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 81789506296 in words is "eighty-one billion, seven hundred eighty-nine million, five hundred six thousand, two hundred ninety-six".