1918380488653 has 2 divisors, whose sum is σ = 1918380488654. Its totient is φ = 1918380488652.

The previous prime is 1918380488573. The next prime is 1918380488663. The reversal of 1918380488653 is 3568840838191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964003894569 + 954376594084 = 981837^2 + 976922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1918380488653 - 2¹³ = 1918380480461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918380488663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959190244326 + 959190244327.

It is an arithmetic number, because the mean of its divisors is an integer number (959190244327).

Almost surely, 2^{1918380488653} is an apocalyptic number.

It is an amenable number.

1918380488653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918380488653 is an equidigital number, since it uses as much as digits as its factorization.

1918380488653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 1918380488653 in words is "one trillion, nine hundred eighteen billion, three hundred eighty million, four hundred eighty-eight thousand, six hundred fifty-three".