81064495 has 8 divisors (see below), whose sum is σ = 97640640. Its totient is φ = 64609440.

The previous prime is 81064471. The next prime is 81064537. The reversal of 81064495 is 59446018.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81064495 - 2²⁵ = 47510063 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28791 + ... + 31480.

It is an arithmetic number, because the mean of its divisors is an integer number (12205080).

Almost surely, 2^81064495 is an apocalyptic number.

81064495 is a deficient number, since it is larger than the sum of its proper divisors (16576145).

81064495 is a wasteful number, since it uses less digits than its factorization.

81064495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60545.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 81064495 is about 9003.5823426012. The cubic root of 81064495 is about 432.7896775230.

The spelling of 81064495 in words is "eighty-one million, sixty-four thousand, four hundred ninety-five".