81040404010 has 32 divisors (see below), whose sum is σ = 151228995840. Its totient is φ = 31230712128.

The previous prime is 81040404007. The next prime is 81040404043. The reversal of 81040404010 is 1040404018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167512 + ... + 436051.

It is an arithmetic number, because the mean of its divisors is an integer number (4725906120).

Almost surely, 2^81040404010 is an apocalyptic number.

81040404010 is a deficient number, since it is larger than the sum of its proper divisors (70188591830).

81040404010 is a wasteful number, since it uses less digits than its factorization.

81040404010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604062.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 81040404010 its reverse (1040404018), we get a palindrome (82080808028).

The spelling of 81040404010 in words is "eighty-one billion, forty million, four hundred four thousand, ten".