81041151504 has 80 divisors (see below), whose sum is σ = 217430904960. Its totient is φ = 25988244480.

The previous prime is 81041151479. The next prime is 81041151509. The reversal of 81041151504 is 40515114018.

It is not an unprimeable number, because it can be changed into a prime (81041151509) by changing a digit.

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, 98292 + ... + 414419.

It is an arithmetic number, because the mean of its divisors is an integer number (2717886312).

Almost surely, 2^81041151504 is an apocalyptic number.

It is an amenable number.

81041151504 is an abundant number, since it is smaller than the sum of its proper divisors (136389753456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81041151504 is a wasteful number, since it uses less digits than its factorization.

81041151504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512848 (or 512842 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 30.

The spelling of 81041151504 in words is "eighty-one billion, forty-one million, one hundred fifty-one thousand, five hundred four".