1557430543079 has 2 divisors, whose sum is σ = 1557430543080. Its totient is φ = 1557430543078.

The previous prime is 1557430543073. The next prime is 1557430543117. The reversal of 1557430543079 is 9703450347551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1557430543079 - 2⁴ = 1557430543063 is a prime.

It is a super-3 number, since 3×1557430543079³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1557430543079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1557430543073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778715271539 + 778715271540.

It is an arithmetic number, because the mean of its divisors is an integer number (778715271540).

Almost surely, 2^{1557430543079} is an apocalyptic number.

1557430543079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557430543079 is an equidigital number, since it uses as much as digits as its factorization.

1557430543079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938000, while the sum is 53.

The spelling of 1557430543079 in words is "one trillion, five hundred fifty-seven billion, four hundred thirty million, five hundred forty-three thousand, seventy-nine".