81051677 has 8 divisors (see below), whose sum is σ = 93672000. Its totient is φ = 68691744.

The previous prime is 81051673. The next prime is 81051703. The reversal of 81051677 is 77615018.

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 81051677 - 2² = 81051673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81051671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64427 + ... + 65672.

It is an arithmetic number, because the mean of its divisors is an integer number (11709000).

Almost surely, 2^81051677 is an apocalyptic number.

It is an amenable number.

81051677 is a deficient number, since it is larger than the sum of its proper divisors (12620323).

81051677 is a wasteful number, since it uses less digits than its factorization.

81051677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130195.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 81051677 is about 9002.8704866837. The cubic root of 81051677 is about 432.7668652733.

The spelling of 81051677 in words is "eighty-one million, fifty-one thousand, six hundred seventy-seven".