1557483121745 has 16 divisors (see below), whose sum is σ = 1914844155840. Its totient is φ = 1215482944704.

The previous prime is 1557483121729. The next prime is 1557483121769. The reversal of 1557483121745 is 5471213847551.

It is a cyclic number.

It is not a de Polignac number, because 1557483121745 - 2⁴ = 1557483121729 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4373255 + ... + 4715964.

It is an arithmetic number, because the mean of its divisors is an integer number (119677759740).

Almost surely, 2^{1557483121745} is an apocalyptic number.

It is an amenable number.

1557483121745 is a deficient number, since it is larger than the sum of its proper divisors (357361034095).

1557483121745 is an equidigital number, since it uses as much as digits as its factorization.

1557483121745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9090064.

The product of its digits is 4704000, while the sum is 53.

The spelling of 1557483121745 in words is "one trillion, five hundred fifty-seven billion, four hundred eighty-three million, one hundred twenty-one thousand, seven hundred forty-five".