81075833177 has 8 divisors (see below), whose sum is σ = 81723551616. Its totient is φ = 80430046432.

The previous prime is 81075833143. The next prime is 81075833183. The reversal of 81075833177 is 77133857018.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81075833177 - 2¹⁰ = 81075832153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81075833077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398588 + ... + 566589.

It is an arithmetic number, because the mean of its divisors is an integer number (10215443952).

Almost surely, 2^81075833177 is an apocalyptic number.

It is an amenable number.

81075833177 is a deficient number, since it is larger than the sum of its proper divisors (647718439).

81075833177 is a wasteful number, since it uses less digits than its factorization.

81075833177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965847.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 81075833177 in words is "eighty-one billion, seventy-five million, eight hundred thirty-three thousand, one hundred seventy-seven".