81040415048 has 32 divisors (see below), whose sum is σ = 152236160760. Its totient is φ = 40444185600.

The previous prime is 81040415039. The next prime is 81040415051. The reversal of 81040415048 is 84051404018.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66490748164 + 14549666884 = 257858^2 + 120622^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81040414999 and 81040415017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10497686 + ... + 10505402.

Almost surely, 2^81040415048 is an apocalyptic number.

It is an amenable number.

81040415048 is a deficient number, since it is larger than the sum of its proper divisors (71195745712).

81040415048 is a wasteful number, since it uses less digits than its factorization.

81040415048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10017 (or 10013 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The spelling of 81040415048 in words is "eighty-one billion, forty million, four hundred fifteen thousand, forty-eight".