17257121132557 has 16 divisors (see below), whose sum is σ = 18668885090688. Its totient is φ = 15910179704320.

The previous prime is 17257121132539. The next prime is 17257121132593. The reversal of 17257121132557 is 75523112175271.

It is a de Polignac number, because none of the positive numbers 2^k-17257121132557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17257121132557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17257121132507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110164108 + ... + 110320645.

It is an arithmetic number, because the mean of its divisors is an integer number (1166805318168).

Almost surely, 2^{17257121132557} is an apocalyptic number.

It is an amenable number.

17257121132557 is a deficient number, since it is larger than the sum of its proper divisors (1411763958131).

17257121132557 is a wasteful number, since it uses less digits than its factorization.

17257121132557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220484900.

The product of its digits is 1029000, while the sum is 49.

The spelling of 17257121132557 in words is "seventeen trillion, two hundred fifty-seven billion, one hundred twenty-one million, one hundred thirty-two thousand, five hundred fifty-seven".