1218040573573 has 2 divisors, whose sum is σ = 1218040573574. Its totient is φ = 1218040573572.

The previous prime is 1218040573531. The next prime is 1218040573577. The reversal of 1218040573573 is 3753750408121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193934284929 + 24106288644 = 1092673^2 + 155262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218040573573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218040573577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609020286786 + 609020286787.

It is an arithmetic number, because the mean of its divisors is an integer number (609020286787).

Almost surely, 2^{1218040573573} is an apocalyptic number.

It is an amenable number.

1218040573573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218040573573 is an equidigital number, since it uses as much as digits as its factorization.

1218040573573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 1218040573573 in words is "one trillion, two hundred eighteen billion, forty million, five hundred seventy-three thousand, five hundred seventy-three".