81363229386 has 32 divisors (see below), whose sum is σ = 166343493120. Its totient is φ = 26524062576.

The previous prime is 81363229373. The next prime is 81363229397. The reversal of 81363229386 is 68392236318.

It is a super-2 number, since 2×81363229386² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672166 + ... + 783921.

It is an arithmetic number, because the mean of its divisors is an integer number (5198234160).

Almost surely, 2^81363229386 is an apocalyptic number.

81363229386 is an abundant number, since it is smaller than the sum of its proper divisors (84980263734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81363229386 is a wasteful number, since it uses less digits than its factorization.

81363229386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456298.

The product of its digits is 2239488, while the sum is 51.

The spelling of 81363229386 in words is "eighty-one billion, three hundred sixty-three million, two hundred twenty-nine thousand, three hundred eighty-six".