181806801 has 32 divisors (see below), whose sum is σ = 283668480. Its totient is φ = 102398400.

The previous prime is 181806799. The next prime is 181806811. The reversal of 181806801 is 108608181.

181806801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 181806801 - 2¹ = 181806799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (181806811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30496 + ... + 35966.

It is an arithmetic number, because the mean of its divisors is an integer number (8864640).

Almost surely, 2^181806801 is an apocalyptic number.

181806801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181806801 is a deficient number, since it is larger than the sum of its proper divisors (101861679).

181806801 is a wasteful number, since it uses less digits than its factorization.

181806801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557.

The product of its (nonzero) digits is 3072, while the sum is 33.

The square root of 181806801 is about 13483.5752306278. The cubic root of 181806801 is about 566.5045144272.

The spelling of 181806801 in words is "one hundred eighty-one million, eight hundred six thousand, eight hundred one".