1818448552717 has 4 divisors (see below), whose sum is σ = 1818514354176. Its totient is φ = 1818382751260.

The previous prime is 1818448552693. The next prime is 1818448552721. The reversal of 1818448552717 is 7172558448181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1818448552717 - 2²⁷ = 1818314334989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818448552727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32859259 + ... + 32914552.

It is an arithmetic number, because the mean of its divisors is an integer number (454628588544).

Almost surely, 2^{1818448552717} is an apocalyptic number.

It is an amenable number.

1818448552717 is a deficient number, since it is larger than the sum of its proper divisors (65801459).

1818448552717 is an equidigital number, since it uses as much as digits as its factorization.

1818448552717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65801458.

The product of its digits is 20070400, while the sum is 61.

The spelling of 1818448552717 in words is "one trillion, eight hundred eighteen billion, four hundred forty-eight million, five hundred fifty-two thousand, seven hundred seventeen".