81742675 has 12 divisors (see below), whose sum is σ = 115841296. Its totient is φ = 56052000.

The previous prime is 81742637. The next prime is 81742709. The reversal of 81742675 is 57624718.

It is not a de Polignac number, because 81742675 - 2⁷ = 81742547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233376 + ... + 233725.

Almost surely, 2^81742675 is an apocalyptic number.

81742675 is a deficient number, since it is larger than the sum of its proper divisors (34098621).

81742675 is a wasteful number, since it uses less digits than its factorization.

81742675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467118 (or 467113 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 81742675 is about 9041.1655775127. The cubic root of 81742675 is about 433.9932237186.

The spelling of 81742675 in words is "eighty-one million, seven hundred forty-two thousand, six hundred seventy-five".