1984486563551 has 2 divisors, whose sum is σ = 1984486563552. Its totient is φ = 1984486563550.

The previous prime is 1984486563539. The next prime is 1984486563659. The reversal of 1984486563551 is 1553656844891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1984486563551 - 2¹⁸ = 1984486301407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984486563151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992243281775 + 992243281776.

It is an arithmetic number, because the mean of its divisors is an integer number (992243281776).

Almost surely, 2^{1984486563551} is an apocalyptic number.

1984486563551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984486563551 is an equidigital number, since it uses as much as digits as its factorization.

1984486563551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416000, while the sum is 65.

The spelling of 1984486563551 in words is "one trillion, nine hundred eighty-four billion, four hundred eighty-six million, five hundred sixty-three thousand, five hundred fifty-one".