161706704520 has 64 divisors (see below), whose sum is σ = 485347893120. Its totient is φ = 43101540864.

The previous prime is 161706704491. The next prime is 161706704521. The reversal of 161706704520 is 25407607161.

161706704520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161706704520² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161706704521) by changing a digit.

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, 58852 + ... + 571731.

It is an arithmetic number, because the mean of its divisors is an integer number (7583560830).

Almost surely, 2^161706704520 is an apocalyptic number.

161706704520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161706704520 is an abundant number, since it is smaller than the sum of its proper divisors (323641188600).

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

161706704520 is a wasteful number, since it uses less digits than its factorization.

161706704520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632734 (or 632730 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 161706704520 in words is "one hundred sixty-one billion, seven hundred six million, seven hundred four thousand, five hundred twenty".