81064335 has 16 divisors (see below), whose sum is σ = 141494400. Its totient is φ = 39303840.

The previous prime is 81064307. The next prime is 81064369. The reversal of 81064335 is 53346018.

It is not a de Polignac number, because 81064335 - 2⁸ = 81064079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245485 + ... + 245814.

It is an arithmetic number, because the mean of its divisors is an integer number (8843400).

Almost surely, 2^81064335 is an apocalyptic number.

81064335 is a deficient number, since it is larger than the sum of its proper divisors (60430065).

81064335 is a wasteful number, since it uses less digits than its factorization.

81064335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491318.

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

The square root of 81064335 is about 9003.5734572446. The cubic root of 81064335 is about 432.7893927851.

The spelling of 81064335 in words is "eighty-one million, sixty-four thousand, three hundred thirty-five".