161717020 has 12 divisors (see below), whose sum is σ = 339605784. Its totient is φ = 64686800.

The previous prime is 161716991. The next prime is 161717051. The reversal of 161717020 is 20717161.

161717020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4042906 + ... + 4042945.

It is an arithmetic number, because the mean of its divisors is an integer number (28300482).

Almost surely, 2^161717020 is an apocalyptic number.

161717020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161717020 is an abundant number, since it is smaller than the sum of its proper divisors (177888764).

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

161717020 is a wasteful number, since it uses less digits than its factorization.

161717020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085860 (or 8085858 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 161717020 is about 12716.8006982889. The cubic root of 161717020 is about 544.8185800217.

The spelling of 161717020 in words is "one hundred sixty-one million, seven hundred seventeen thousand, twenty".