81738335675 has 48 divisors (see below), whose sum is σ = 105035277312. Its totient is φ = 63061804800.

The previous prime is 81738335669. The next prime is 81738335719. The reversal of 81738335675 is 57653383718.

It is not a de Polignac number, because 81738335675 - 2³⁶ = 13018858939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81738335675.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47493815 + ... + 47495535.

It is an arithmetic number, because the mean of its divisors is an integer number (2188234944).

Almost surely, 2^81738335675 is an apocalyptic number.

81738335675 is a deficient number, since it is larger than the sum of its proper divisors (23296941637).

81738335675 is a wasteful number, since it uses less digits than its factorization.

81738335675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348 (or 2343 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 56.

The spelling of 81738335675 in words is "eighty-one billion, seven hundred thirty-eight million, three hundred thirty-five thousand, six hundred seventy-five".