89181681816 has 32 divisors (see below), whose sum is σ = 222964210800. Its totient is φ = 29725893120.

The previous prime is 89181681793. The next prime is 89181681817. The reversal of 89181681816 is 61818618198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89181681817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565596 + ... + 705876.

Almost surely, 2^89181681816 is an apocalyptic number.

It is an amenable number.

89181681816 is an abundant number, since it is smaller than the sum of its proper divisors (133782528984).

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

89181681816 is a wasteful number, since it uses less digits than its factorization.

89181681816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166779 (or 166775 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 57.

The spelling of 89181681816 in words is "eighty-nine billion, one hundred eighty-one million, six hundred eighty-one thousand, eight hundred sixteen".