171902385355 has 16 divisors (see below), whose sum is σ = 211894455744. Its totient is φ = 133782122880.

The previous prime is 171902385337. The next prime is 171902385359. The reversal of 171902385355 is 553583209171.

It is a happy number.

It is not a de Polignac number, because 171902385355 - 2¹⁷ = 171902254283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171902385299 and 171902385308.

It is not an unprimeable number, because it can be changed into a prime (171902385359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1043050 + ... + 1196560.

It is an arithmetic number, because the mean of its divisors is an integer number (13243403484).

Almost surely, 2^171902385355 is an apocalyptic number.

171902385355 is a deficient number, since it is larger than the sum of its proper divisors (39992070389).

171902385355 is a wasteful number, since it uses less digits than its factorization.

171902385355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159606.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 171902385355 in words is "one hundred seventy-one billion, nine hundred two million, three hundred eighty-five thousand, three hundred fifty-five".