81079200960 has 56 divisors (see below), whose sum is σ = 257426466096. Its totient is φ = 21621120000.

The previous prime is 81079200919. The next prime is 81079201013. The reversal of 81079200960 is 6900297018.

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, 42227791 + ... + 42229710.

Almost surely, 2^81079200960 is an apocalyptic number.

81079200960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81079200960 is an abundant number, since it is smaller than the sum of its proper divisors (176347265136).

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

81079200960 is a wasteful number, since it uses less digits than its factorization.

81079200960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84457521 (or 84457511 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

Adding to 81079200960 its reverse (6900297018), we get a palindrome (87979497978).

The spelling of 81079200960 in words is "eighty-one billion, seventy-nine million, two hundred thousand, nine hundred sixty".