81106001349 has 4 divisors (see below), whose sum is σ = 108141335136. Its totient is φ = 54070667564.

The previous prime is 81106001329. The next prime is 81106001359. The reversal of 81106001349 is 94310060118.

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 81106001349 - 2⁹ = 81106000837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81106001329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13517666889 + ... + 13517666894.

It is an arithmetic number, because the mean of its divisors is an integer number (27035333784).

Almost surely, 2^81106001349 is an apocalyptic number.

It is an amenable number.

81106001349 is a deficient number, since it is larger than the sum of its proper divisors (27035333787).

81106001349 is a wasteful number, since it uses less digits than its factorization.

81106001349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27035333786.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 81106001349 in words is "eighty-one billion, one hundred six million, one thousand, three hundred forty-nine".