1808612388893 has 2 divisors, whose sum is σ = 1808612388894. Its totient is φ = 1808612388892.

The previous prime is 1808612388827. The next prime is 1808612388943. The reversal of 1808612388893 is 3988832168081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243766949049 + 564845439844 = 1115243^2 + 751562^2 .

It is a cyclic number.

It is not a de Polignac number, because 1808612388893 - 2¹⁴ = 1808612372509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1808612385893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904306194446 + 904306194447.

It is an arithmetic number, because the mean of its divisors is an integer number (904306194447).

Almost surely, 2^{1808612388893} is an apocalyptic number.

It is an amenable number.

1808612388893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808612388893 is an equidigital number, since it uses as much as digits as its factorization.

1808612388893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31850496, while the sum is 65.

The spelling of 1808612388893 in words is "one trillion, eight hundred eight billion, six hundred twelve million, three hundred eighty-eight thousand, eight hundred ninety-three".