81264345750353 has 4 divisors (see below), whose sum is σ = 81265372062960. Its totient is φ = 81263319437748.

The previous prime is 81264345750331. The next prime is 81264345750397. The reversal of 81264345750353 is 35305754346218.

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 81264345750353 - 2¹⁰ = 81264345749329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81264345750323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513037523 + ... + 513195896.

It is an arithmetic number, because the mean of its divisors is an integer number (20316343015740).

Almost surely, 2^{81264345750353} is an apocalyptic number.

It is an amenable number.

81264345750353 is a deficient number, since it is larger than the sum of its proper divisors (1026312607).

81264345750353 is a wasteful number, since it uses less digits than its factorization.

81264345750353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026312606.

The product of its (nonzero) digits is 36288000, while the sum is 56.

The spelling of 81264345750353 in words is "eighty-one trillion, two hundred sixty-four billion, three hundred forty-five million, seven hundred fifty thousand, three hundred fifty-three".