81734473075 has 6 divisors (see below), whose sum is σ = 101350746644. Its totient is φ = 65387578440.

The previous prime is 81734473063. The next prime is 81734473099. The reversal of 81734473075 is 57037443718.

It is not a de Polignac number, because 81734473075 - 2⁷ = 81734472947 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 1634689437 + ... + 1634689486.

Almost surely, 2^81734473075 is an apocalyptic number.

81734473075 is a deficient number, since it is larger than the sum of its proper divisors (19616273569).

81734473075 is a wasteful number, since it uses less digits than its factorization.

81734473075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269378933 (or 3269378928 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 81734473075 in words is "eighty-one billion, seven hundred thirty-four million, four hundred seventy-three thousand, seventy-five".