1618567547953 has 2 divisors, whose sum is σ = 1618567547954. Its totient is φ = 1618567547952.

The previous prime is 1618567547921. The next prime is 1618567547959. The reversal of 1618567547953 is 3597457658161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1582319957409 + 36247590544 = 1257903^2 + 190388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1618567547953 - 2⁵ = 1618567547921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1618567547959) by changing a digit.

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, 809283773976 + 809283773977.

It is an arithmetic number, because the mean of its divisors is an integer number (809283773977).

Almost surely, 2^{1618567547953} is an apocalyptic number.

It is an amenable number.

1618567547953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618567547953 is an equidigital number, since it uses as much as digits as its factorization.

1618567547953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512000, while the sum is 67.

The spelling of 1618567547953 in words is "one trillion, six hundred eighteen billion, five hundred sixty-seven million, five hundred forty-seven thousand, nine hundred fifty-three".