1618525775653 has 2 divisors, whose sum is σ = 1618525775654. Its totient is φ = 1618525775652.

The previous prime is 1618525775651. The next prime is 1618525775681. The reversal of 1618525775653 is 3565775258161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1445301670849 + 173224104804 = 1202207^2 + 416202^2 .

It is a cyclic number.

It is not a de Polignac number, because 1618525775653 - 2¹ = 1618525775651 is a prime.

Together with 1618525775651, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1618525775591 and 1618525775600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1618525775651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809262887826 + 809262887827.

It is an arithmetic number, because the mean of its divisors is an integer number (809262887827).

Almost surely, 2^{1618525775653} is an apocalyptic number.

It is an amenable number.

1618525775653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618525775653 is an equidigital number, since it uses as much as digits as its factorization.

1618525775653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920000, while the sum is 61.

The spelling of 1618525775653 in words is "one trillion, six hundred eighteen billion, five hundred twenty-five million, seven hundred seventy-five thousand, six hundred fifty-three".