1556246426851 has 2 divisors, whose sum is σ = 1556246426852. Its totient is φ = 1556246426850.

The previous prime is 1556246426831. The next prime is 1556246426873. The reversal of 1556246426851 is 1586246426551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1556246426851 - 2³¹ = 1554098943203 is a prime.

It is a super-3 number, since 3×1556246426851³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1556246426792 and 1556246426801.

It is not a weakly prime, because it can be changed into another prime (1556246426831) by changing a digit.

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, 778123213425 + 778123213426.

It is an arithmetic number, because the mean of its divisors is an integer number (778123213426).

Almost surely, 2^{1556246426851} is an apocalyptic number.

1556246426851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556246426851 is an equidigital number, since it uses as much as digits as its factorization.

1556246426851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824000, while the sum is 55.

The spelling of 1556246426851 in words is "one trillion, five hundred fifty-six billion, two hundred forty-six million, four hundred twenty-six thousand, eight hundred fifty-one".