80181810 has 96 divisors (see below), whose sum is σ = 222842880. Its totient is φ = 19958400.

The previous prime is 80181769. The next prime is 80181811. The reversal of 80181810 is 1818108.

It is a super-2 number, since 2×80181810² = 12858245309752200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80181811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80415 + ... + 81405.

It is an arithmetic number, because the mean of its divisors is an integer number (2321280).

Almost surely, 2^80181810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80181810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111421440).

80181810 is an abundant number, since it is smaller than the sum of its proper divisors (142661070).

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

80181810 is a wasteful number, since it uses less digits than its factorization.

80181810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

The square root of 80181810 is about 8954.4296300769. The cubic root of 80181810 is about 431.2131058544.

Adding to 80181810 its reverse (1818108), we get a palindrome (81999918).

The spelling of 80181810 in words is "eighty million, one hundred eighty-one thousand, eight hundred ten".