81173612362 has 16 divisors (see below), whose sum is σ = 127614076992. Its totient is φ = 38651134720.

The previous prime is 81173612327. The next prime is 81173612371. The reversal of 81173612362 is 26321637118.

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 7 ways as a sum of consecutive naturals, for example, 3876439 + ... + 3897322.

It is an arithmetic number, because the mean of its divisors is an integer number (7975879812).

Almost surely, 2^81173612362 is an apocalyptic number.

81173612362 is a deficient number, since it is larger than the sum of its proper divisors (46440464630).

81173612362 is a wasteful number, since it uses less digits than its factorization.

81173612362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7774013.

The product of its digits is 72576, while the sum is 40.

The spelling of 81173612362 in words is "eighty-one billion, one hundred seventy-three million, six hundred twelve thousand, three hundred sixty-two".