1557358495079 has 4 divisors (see below), whose sum is σ = 1607595865920. Its totient is φ = 1507121124240.

The previous prime is 1557358494997. The next prime is 1557358495111. The reversal of 1557358495079 is 9705948537551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1557358495079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557358495379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25118685374 + ... + 25118685435.

It is an arithmetic number, because the mean of its divisors is an integer number (401898966480).

Almost surely, 2^{1557358495079} is an apocalyptic number.

1557358495079 is a deficient number, since it is larger than the sum of its proper divisors (50237370841).

1557358495079 is an equidigital number, since it uses as much as digits as its factorization.

1557358495079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50237370840.

The product of its (nonzero) digits is 238140000, while the sum is 68.

The spelling of 1557358495079 in words is "one trillion, five hundred fifty-seven billion, three hundred fifty-eight million, four hundred ninety-five thousand, seventy-nine".