81046299343 has 4 divisors (see below), whose sum is σ = 83660696128. Its totient is φ = 78431902560.

The previous prime is 81046299329. The next prime is 81046299361. The reversal of 81046299343 is 34399264018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81046299343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046299743) 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, 1307198346 + ... + 1307198407.

It is an arithmetic number, because the mean of its divisors is an integer number (20915174032).

Almost surely, 2^81046299343 is an apocalyptic number.

81046299343 is a deficient number, since it is larger than the sum of its proper divisors (2614396785).

81046299343 is a wasteful number, since it uses less digits than its factorization.

81046299343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614396784.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 81046299343 in words is "eighty-one billion, forty-six million, two hundred ninety-nine thousand, three hundred forty-three".