1556740883651 has 2 divisors, whose sum is σ = 1556740883652. Its totient is φ = 1556740883650.

The previous prime is 1556740883641. The next prime is 1556740883693. The reversal of 1556740883651 is 1563880476551.

It is a weak prime.

It is an emirp because it is prime and its reverse (1563880476551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1556740883651 - 2¹⁴ = 1556740867267 is a prime.

It is not a weakly prime, because it can be changed into another prime (1556740883611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778370441825 + 778370441826.

It is an arithmetic number, because the mean of its divisors is an integer number (778370441826).

Almost surely, 2^{1556740883651} is an apocalyptic number.

1556740883651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556740883651 is an equidigital number, since it uses as much as digits as its factorization.

1556740883651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192000, while the sum is 59.

The spelling of 1556740883651 in words is "one trillion, five hundred fifty-six billion, seven hundred forty million, eight hundred eighty-three thousand, six hundred fifty-one".