81064841 has 16 divisors (see below), whose sum is σ = 96669888. Its totient is φ = 67003200.

The previous prime is 81064829. The next prime is 81064871. The reversal of 81064841 is 14846018.

It is not a de Polignac number, because 81064841 - 2⁶ = 81064777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81064798 and 81064807.

It is not an unprimeable number, because it can be changed into a prime (81064871) 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, 5351 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (6041868).

Almost surely, 2^81064841 is an apocalyptic number.

It is an amenable number.

81064841 is a deficient number, since it is larger than the sum of its proper divisors (15605047).

81064841 is a wasteful number, since it uses less digits than its factorization.

81064841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 81064841 is about 9003.6015571548. The cubic root of 81064841 is about 432.7902932674.

The spelling of 81064841 in words is "eighty-one million, sixty-four thousand, eight hundred forty-one".