81952700184 has 128 divisors (see below), whose sum is σ = 235104768000. Its totient is φ = 26435642112.

The previous prime is 81952700147. The next prime is 81952700189. The reversal of 81952700184 is 48100725918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81952700189) 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 in 31 ways as a sum of consecutive naturals, for example, 858177 + ... + 948879.

It is an arithmetic number, because the mean of its divisors is an integer number (1836756000).

Almost surely, 2^81952700184 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81952700184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117552384000).

81952700184 is an abundant number, since it is smaller than the sum of its proper divisors (153152067816).

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

81952700184 is a wasteful number, since it uses less digits than its factorization.

81952700184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90854 (or 90844 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 81952700184 in words is "eighty-one billion, nine hundred fifty-two million, seven hundred thousand, one hundred eighty-four".