81055753 has 4 divisors (see below), whose sum is σ = 81221328. Its totient is φ = 80890180.

The previous prime is 81055739. The next prime is 81055759. The reversal of 81055753 is 35755018.

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 81055753 - 2⁹ = 81055241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81055759) 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, 82051 + ... + 83032.

It is an arithmetic number, because the mean of its divisors is an integer number (20305332).

Almost surely, 2^81055753 is an apocalyptic number.

It is an amenable number.

81055753 is a deficient number, since it is larger than the sum of its proper divisors (165575).

81055753 is a wasteful number, since it uses less digits than its factorization.

81055753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165574.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 81055753 is about 9003.0968560824. The cubic root of 81055753 is about 432.7741196088.

The spelling of 81055753 in words is "eighty-one million, fifty-five thousand, seven hundred fifty-three".