81936027752 has 32 divisors (see below), whose sum is σ = 154352563200. Its totient is φ = 40775523264.

The previous prime is 81936027751. The next prime is 81936027773. The reversal of 81936027752 is 25772063918.

It is a self number, because there is not a number n which added to its sum of digits gives 81936027752.

It is not an unprimeable number, because it can be changed into a prime (81936027751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4087418 + ... + 4107414.

It is an arithmetic number, because the mean of its divisors is an integer number (4823517600).

Almost surely, 2^81936027752 is an apocalyptic number.

It is an amenable number.

81936027752 is a deficient number, since it is larger than the sum of its proper divisors (72416535448).

81936027752 is a wasteful number, since it uses less digits than its factorization.

81936027752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22385 (or 22381 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 81936027752 in words is "eighty-one billion, nine hundred thirty-six million, twenty-seven thousand, seven hundred fifty-two".