171948690111 has 16 divisors (see below), whose sum is σ = 250649739648. Its totient is φ = 103985263200.

The previous prime is 171948690091. The next prime is 171948690139. The reversal of 171948690111 is 111096849171.

It is not a de Polignac number, because 171948690111 - 2⁵ = 171948690079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171948690181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5636161 + ... + 5666586.

It is an arithmetic number, because the mean of its divisors is an integer number (15665608728).

Almost surely, 2^171948690111 is an apocalyptic number.

171948690111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

171948690111 is a deficient number, since it is larger than the sum of its proper divisors (78701049537).

171948690111 is a wasteful number, since it uses less digits than its factorization.

171948690111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11303222.

The product of its (nonzero) digits is 108864, while the sum is 48.

The spelling of 171948690111 in words is "one hundred seventy-one billion, nine hundred forty-eight million, six hundred ninety thousand, one hundred eleven".