81167051120 has 40 divisors (see below), whose sum is σ = 193102085616. Its totient is φ = 31711776768.

The previous prime is 81167051057. The next prime is 81167051137. The reversal of 81167051120 is 2115076118.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 11794097 + ... + 11800976.

Almost surely, 2^81167051120 is an apocalyptic number.

81167051120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81167051120 is an abundant number, since it is smaller than the sum of its proper divisors (111935034496).

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

81167051120 is a wasteful number, since it uses less digits than its factorization.

81167051120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23595129 (or 23595123 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 32.

The spelling of 81167051120 in words is "eighty-one billion, one hundred sixty-seven million, fifty-one thousand, one hundred twenty".