81745035 has 16 divisors (see below), whose sum is σ = 132585504. Its totient is φ = 42999552.

The previous prime is 81745009. The next prime is 81745039. The reversal of 81745035 is 53054718.

It is not a de Polignac number, because 81745035 - 2⁵ = 81745003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81744987 and 81745005.

It is not an unprimeable number, because it can be changed into a prime (81745039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36232 + ... + 38421.

It is an arithmetic number, because the mean of its divisors is an integer number (8286594).

Almost surely, 2^81745035 is an apocalyptic number.

81745035 is a deficient number, since it is larger than the sum of its proper divisors (50840469).

81745035 is a wasteful number, since it uses less digits than its factorization.

81745035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74734.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 81745035 is about 9041.2960907162. The cubic root of 81745035 is about 433.9974002973.

The spelling of 81745035 in words is "eighty-one million, seven hundred forty-five thousand, thirty-five".