1557495173117 has 8 divisors (see below), whose sum is σ = 1677313739640. Its totient is φ = 1437678213120.

The previous prime is 1557495173099. The next prime is 1557495173137. The reversal of 1557495173117 is 7113715947551.

It can be written as a sum of positive squares in 4 ways, for example, as 142408871641 + 1415086301476 = 377371^2 + 1189574^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1557495173117 - 2¹⁴ = 1557495156733 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 (1557495173137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2270309 + ... + 2875637.

It is an arithmetic number, because the mean of its divisors is an integer number (209664217455).

Almost surely, 2^{1557495173117} is an apocalyptic number.

It is an amenable number.

1557495173117 is a deficient number, since it is larger than the sum of its proper divisors (119818566523).

1557495173117 is a wasteful number, since it uses less digits than its factorization.

1557495173117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803263.

The product of its digits is 4630500, while the sum is 56.

The spelling of 1557495173117 in words is "one trillion, five hundred fifty-seven billion, four hundred ninety-five million, one hundred seventy-three thousand, one hundred seventeen".