81363672785146 has 8 divisors (see below), whose sum is σ = 123764460011424. Its totient is φ = 40108852781340.

The previous prime is 81363672785123. The next prime is 81363672785201. The reversal of 81363672785146 is 64158727636318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286491805440 + ... + 286491805723.

It is an arithmetic number, because the mean of its divisors is an integer number (15470557501428).

Almost surely, 2^{81363672785146} is an apocalyptic number.

81363672785146 is a deficient number, since it is larger than the sum of its proper divisors (42400787226278).

81363672785146 is a wasteful number, since it uses less digits than its factorization.

81363672785146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572983611236.

The product of its digits is 243855360, while the sum is 67.

The spelling of 81363672785146 in words is "eighty-one trillion, three hundred sixty-three billion, six hundred seventy-two million, seven hundred eighty-five thousand, one hundred forty-six".