81936027753 has 4 divisors (see below), whose sum is σ = 109248037008. Its totient is φ = 54624018500.

The previous prime is 81936027751. The next prime is 81936027773. The reversal of 81936027753 is 35772063918.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81936027753 - 2¹ = 81936027751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81936027696 and 81936027705.

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 3 ways as a sum of consecutive naturals, for example, 13656004623 + ... + 13656004628.

It is an arithmetic number, because the mean of its divisors is an integer number (27312009252).

Almost surely, 2^81936027753 is an apocalyptic number.

It is an amenable number.

81936027753 is a deficient number, since it is larger than the sum of its proper divisors (27312009255).

81936027753 is a wasteful number, since it uses less digits than its factorization.

81936027753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27312009254.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 81936027753 in words is "eighty-one billion, nine hundred thirty-six million, twenty-seven thousand, seven hundred fifty-three".