170042191905 has 16 divisors (see below), whose sum is σ = 272072649024. Its totient is φ = 90687455040.

The previous prime is 170042191889. The next prime is 170042191927. The reversal of 170042191905 is 509191240071.

170042191905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 170042191905 - 2⁴ = 170042191889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1370290 + ... + 1489220.

It is an arithmetic number, because the mean of its divisors is an integer number (17004540564).

Almost surely, 2^170042191905 is an apocalyptic number.

170042191905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

170042191905 is a deficient number, since it is larger than the sum of its proper divisors (102030457119).

170042191905 is a wasteful number, since it uses less digits than its factorization.

170042191905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214256.

The product of its (nonzero) digits is 22680, while the sum is 39.

The spelling of 170042191905 in words is "one hundred seventy billion, forty-two million, one hundred ninety-one thousand, nine hundred five".