171023012020557 has 8 divisors (see below), whose sum is σ = 253367425215680. Its totient is φ = 114015341347020.

The previous prime is 171023012020463. The next prime is 171023012020583. The reversal of 171023012020557 is 755020210320171.

171023012020557 is a `hidden beast` number, since 1 + 71 + 0 + 2 + 3 + 0 + 12 + 0 + 20 + 557 = 666.

It is not a de Polignac number, because 171023012020557 - 2³⁰ = 171021938278733 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 (171023012020057) 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 7 ways as a sum of consecutive naturals, for example, 3167092815169 + ... + 3167092815222.

It is an arithmetic number, because the mean of its divisors is an integer number (31670928151960).

Almost surely, 2^{171023012020557} is an apocalyptic number.

It is an amenable number.

171023012020557 is a deficient number, since it is larger than the sum of its proper divisors (82344413195123).

171023012020557 is an equidigital number, since it uses as much as digits as its factorization.

171023012020557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334185630400 (or 6334185630394 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The spelling of 171023012020557 in words is "one hundred seventy-one trillion, twenty-three billion, twelve million, twenty thousand, five hundred fifty-seven".