81036435 has 8 divisors (see below), whose sum is σ = 129658320. Its totient is φ = 43219424.

The previous prime is 81036407. The next prime is 81036437. The reversal of 81036435 is 53463018.

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 81036435 - 2¹⁵ = 81003667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81036437) 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, 2701200 + ... + 2701229.

It is an arithmetic number, because the mean of its divisors is an integer number (16207290).

Almost surely, 2^81036435 is an apocalyptic number.

81036435 is a deficient number, since it is larger than the sum of its proper divisors (48621885).

81036435 is a wasteful number, since it uses less digits than its factorization.

81036435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402437.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 81036435 is about 9002.0239390928. The cubic root of 81036435 is about 432.7397358898.

The spelling of 81036435 in words is "eighty-one million, thirty-six thousand, four hundred thirty-five".