81896702976 has 297 divisors, whose sum is σ = 260889693519. Its totient is φ = 24725606400.

The previous prime is 81896702971. The next prime is 81896703011. The reversal of 81896702976 is 67920769818.

The square root of 81896702976 is 286176.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (81896702971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 302201721 + ... + 302201991.

Almost surely, 2^81896702976 is an apocalyptic number.

81896702976 is the 286176-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81896702976

81896702976 is an abundant number, since it is smaller than the sum of its proper divisors (178992990543).

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

81896702976 is a wasteful number, since it uses less digits than its factorization.

81896702976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 81896702976 in words is "eighty-one billion, eight hundred ninety-six million, seven hundred two thousand, nine hundred seventy-six".