171990001290 has 16 divisors (see below), whose sum is σ = 412776003168. Its totient is φ = 45864000336.

The previous prime is 171990001277. The next prime is 171990001331. The reversal of 171990001290 is 92100099171.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2866499992 + ... + 2866500051.

It is an arithmetic number, because the mean of its divisors is an integer number (25798500198).

Almost surely, 2^171990001290 is an apocalyptic number.

171990001290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

171990001290 is an abundant number, since it is smaller than the sum of its proper divisors (240786001878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171990001290 is a wasteful number, since it uses less digits than its factorization.

171990001290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733000053.

The product of its (nonzero) digits is 10206, while the sum is 39.

The spelling of 171990001290 in words is "one hundred seventy-one billion, nine hundred ninety million, one thousand, two hundred ninety".