161617964170 has 32 divisors (see below), whose sum is σ = 313308479232. Its totient is φ = 59670844992.

The previous prime is 161617964159. The next prime is 161617964171. The reversal of 161617964170 is 71469716161.

It is a super-2 number, since 2×161617964170² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161617964171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3594649 + ... + 3639331.

It is an arithmetic number, because the mean of its divisors is an integer number (9790889976).

Almost surely, 2^161617964170 is an apocalyptic number.

161617964170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161617964170 is a deficient number, since it is larger than the sum of its proper divisors (151690515062).

161617964170 is a wasteful number, since it uses less digits than its factorization.

161617964170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72526.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 161617964170 in words is "one hundred sixty-one billion, six hundred seventeen million, nine hundred sixty-four thousand, one hundred seventy".