1618226553668 has 6 divisors (see below), whose sum is σ = 2831896468926. Its totient is φ = 809113276832.

The previous prime is 1618226553659. The next prime is 1618226553677. The reversal of 1618226553668 is 8663556228161.

It is an interprime number because it is at equal distance from previous prime (1618226553659) and next prime (1618226553677).

It can be written as a sum of positive squares in only one way, i.e., 1529852344384 + 88374209284 = 1236872^2 + 297278^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202278319205 + ... + 202278319212.

It is an arithmetic number, because the mean of its divisors is an integer number (471982744821).

Almost surely, 2^{1618226553668} is an apocalyptic number.

It is an amenable number.

1618226553668 is a deficient number, since it is larger than the sum of its proper divisors (1213669915258).

1618226553668 is a wasteful number, since it uses less digits than its factorization.

1618226553668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404556638421 (or 404556638419 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 59.

The spelling of 1618226553668 in words is "one trillion, six hundred eighteen billion, two hundred twenty-six million, five hundred fifty-three thousand, six hundred sixty-eight".