1556344337941 has 2 divisors, whose sum is σ = 1556344337942. Its totient is φ = 1556344337940.

The previous prime is 1556344337927. The next prime is 1556344337983. The reversal of 1556344337941 is 1497334436551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1273634130916 + 282710207025 = 1128554^2 + 531705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1556344337941 - 2⁷ = 1556344337813 is a prime.

It is a super-2 number, since 2×1556344337941² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1556344437941) 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, 778172168970 + 778172168971.

It is an arithmetic number, because the mean of its divisors is an integer number (778172168971).

Almost surely, 2^{1556344337941} is an apocalyptic number.

It is an amenable number.

1556344337941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556344337941 is an equidigital number, since it uses as much as digits as its factorization.

1556344337941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 55.

The spelling of 1556344337941 in words is "one trillion, five hundred fifty-six billion, three hundred forty-four million, three hundred thirty-seven thousand, nine hundred forty-one".