81017675 has 6 divisors (see below), whose sum is σ = 100461948. Its totient is φ = 64814120.

The previous prime is 81017659. The next prime is 81017701. The reversal of 81017675 is 57671018.

It is not a de Polignac number, because 81017675 - 2⁴ = 81017659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1620329 + ... + 1620378.

It is an arithmetic number, because the mean of its divisors is an integer number (16743658).

Almost surely, 2^81017675 is an apocalyptic number.

81017675 is a deficient number, since it is larger than the sum of its proper divisors (19444273).

81017675 is a wasteful number, since it uses less digits than its factorization.

81017675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240717 (or 3240712 counting only the distinct ones).

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

The square root of 81017675 is about 9000.9818908828. The cubic root of 81017675 is about 432.7063401135.

The spelling of 81017675 in words is "eighty-one million, seventeen thousand, six hundred seventy-five".