81143363346202 has 12 divisors (see below), whose sum is σ = 126056842109406. Its totient is φ = 39172658166320.

The previous prime is 81143363346193. The next prime is 81143363346277. The reversal of 81143363346202 is 20264336334118.

It can be written as a sum of positive squares in 3 ways, for example, as 57954891321721 + 23188472024481 = 7612811^2 + 4815441^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 24121093249 + ... + 24121096612.

Almost surely, 2^{81143363346202} is an apocalyptic number.

81143363346202 is a deficient number, since it is larger than the sum of its proper divisors (44913478763204).

81143363346202 is a wasteful number, since it uses less digits than its factorization.

81143363346202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48242189921 (or 48242189892 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 81143363346202 in words is "eighty-one trillion, one hundred forty-three billion, three hundred sixty-three million, three hundred forty-six thousand, two hundred two".