81746675045 has 32 divisors (see below), whose sum is σ = 112619946240. Its totient is φ = 55800345600.

The previous prime is 81746675011. The next prime is 81746675053. The reversal of 81746675045 is 54057664718.

It is not a de Polignac number, because 81746675045 - 2¹² = 81746670949 is a prime.

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 7138094 + ... + 7149536.

It is an arithmetic number, because the mean of its divisors is an integer number (3519373320).

Almost surely, 2^81746675045 is an apocalyptic number.

It is an amenable number.

81746675045 is a deficient number, since it is larger than the sum of its proper divisors (30873271195).

81746675045 is a wasteful number, since it uses less digits than its factorization.

81746675045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12365.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 81746675045 in words is "eighty-one billion, seven hundred forty-six million, six hundred seventy-five thousand, forty-five".