81011753 has 4 divisors (see below), whose sum is σ = 81044880. Its totient is φ = 80978628.

The previous prime is 81011741. The next prime is 81011803. The reversal of 81011753 is 35711018.

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 81011753 - 2⁴ = 81011737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81011713) 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, 12575 + ... + 17892.

It is an arithmetic number, because the mean of its divisors is an integer number (20261220).

Almost surely, 2^81011753 is an apocalyptic number.

It is an amenable number.

81011753 is a deficient number, since it is larger than the sum of its proper divisors (33127).

81011753 is a wasteful number, since it uses less digits than its factorization.

81011753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33126.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 81011753 is about 9000.6529207608. The cubic root of 81011753 is about 432.6957969434.

The spelling of 81011753 in words is "eighty-one million, eleven thousand, seven hundred fifty-three".