81176855000 has 40 divisors (see below), whose sum is σ = 190197382980. Its totient is φ = 32470740000.

The previous prime is 81176854963. The next prime is 81176855009. The reversal of 81176855000 is 55867118.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81176855009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8112686 + ... + 8122685.

Almost surely, 2^81176855000 is an apocalyptic number.

It is an amenable number.

81176855000 is an abundant number, since it is smaller than the sum of its proper divisors (109020527980).

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

81176855000 is a wasteful number, since it uses less digits than its factorization.

81176855000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16235397 (or 16235378 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 41.

The spelling of 81176855000 in words is "eighty-one billion, one hundred seventy-six million, eight hundred fifty-five thousand".