81675315175 has 24 divisors (see below), whose sum is σ = 102297068640. Its totient is φ = 64682851200.

The previous prime is 81675315149. The next prime is 81675315193. The reversal of 81675315175 is 57151357618.

It is not a de Polignac number, because 81675315175 - 2⁷ = 81675315047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13544061 + ... + 13550089.

It is an arithmetic number, because the mean of its divisors is an integer number (4262377860).

Almost surely, 2^81675315175 is an apocalyptic number.

81675315175 is a deficient number, since it is larger than the sum of its proper divisors (20621753465).

81675315175 is a wasteful number, since it uses less digits than its factorization.

81675315175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11403 (or 11398 counting only the distinct ones).

The product of its digits is 882000, while the sum is 49.

The spelling of 81675315175 in words is "eighty-one billion, six hundred seventy-five million, three hundred fifteen thousand, one hundred seventy-five".