1816188001 has 2 divisors, whose sum is σ = 1816188002. Its totient is φ = 1816188000.

The previous prime is 1816187999. The next prime is 1816188067. The reversal of 1816188001 is 1008816181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1736888976 + 79299025 = 41676^2 + 8905^2 .

It is an emirp because it is prime and its reverse (1008816181) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1008819181 and 1819188001.

It is a cyclic number.

It is not a de Polignac number, because 1816188001 - 2¹ = 1816187999 is a prime.

Together with 1816187999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1816188301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908094000 + 908094001.

It is an arithmetic number, because the mean of its divisors is an integer number (908094001).

Almost surely, 2^1816188001 is an apocalyptic number.

It is an amenable number.

1816188001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816188001 is an equidigital number, since it uses as much as digits as its factorization.

1816188001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 34.

The square root of 1816188001 is about 42616.7572792675. The cubic root of 1816188001 is about 1220.0761398776.

The spelling of 1816188001 in words is "one billion, eight hundred sixteen million, one hundred eighty-eight thousand, one".