81422080800 has 72 divisors (see below), whose sum is σ = 265028880816. Its totient is φ = 21712554240.

The previous prime is 81422080793. The next prime is 81422080837. The reversal of 81422080800 is 808022418.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16960534 + ... + 16965333.

It is an arithmetic number, because the mean of its divisors is an integer number (3680956678).

Almost surely, 2^81422080800 is an apocalyptic number.

81422080800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81422080800 is an abundant number, since it is smaller than the sum of its proper divisors (183606800016).

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

81422080800 is a wasteful number, since it uses less digits than its factorization.

81422080800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33925890 (or 33925877 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The spelling of 81422080800 in words is "eighty-one billion, four hundred twenty-two million, eighty thousand, eight hundred".