1556851464863 has 2 divisors, whose sum is σ = 1556851464864. Its totient is φ = 1556851464862.

The previous prime is 1556851464851. The next prime is 1556851464871. The reversal of 1556851464863 is 3684641586551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1556851464863 - 2⁶ = 1556851464799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1556851464796 and 1556851464805.

It is a congruent number.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778425732431 + 778425732432.

It is an arithmetic number, because the mean of its divisors is an integer number (778425732432).

Almost surely, 2^{1556851464863} is an apocalyptic number.

1556851464863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556851464863 is an equidigital number, since it uses as much as digits as its factorization.

1556851464863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944000, while the sum is 62.

The spelling of 1556851464863 in words is "one trillion, five hundred fifty-six billion, eight hundred fifty-one million, four hundred sixty-four thousand, eight hundred sixty-three".