161617070706 has 64 divisors (see below), whose sum is σ = 408578757888. Its totient is φ = 41472269568.

The previous prime is 161617070701. The next prime is 161617070753. The reversal of 161617070706 is 607070716161.

It is a super-2 number, since 2×161617070706² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (161617070701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3979825 + ... + 4020228.

It is an arithmetic number, because the mean of its divisors is an integer number (6384043092).

Almost surely, 2^161617070706 is an apocalyptic number.

161617070706 is an abundant number, since it is smaller than the sum of its proper divisors (246961687182).

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

161617070706 is a wasteful number, since it uses less digits than its factorization.

161617070706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8000115.

The product of its (nonzero) digits is 74088, while the sum is 42.

Adding to 161617070706 its reverse (607070716161), we get a palindrome (768687786867).

The spelling of 161617070706 in words is "one hundred sixty-one billion, six hundred seventeen million, seventy thousand, seven hundred six".