161717501088 has 144 divisors (see below), whose sum is σ = 540283607136. Its totient is φ = 45235653120.

The previous prime is 161717501087. The next prime is 161717501107. The reversal of 161717501088 is 880105717161.

It is a happy number.

161717501088 is a `hidden beast` number, since 1 + 61 + 7 + 1 + 7 + 501 + 0 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161717501087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1922170 + ... + 2004537.

It is an arithmetic number, because the mean of its divisors is an integer number (3751969494).

Almost surely, 2^161717501088 is an apocalyptic number.

161717501088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161717501088 is an abundant number, since it is smaller than the sum of its proper divisors (378566106048).

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

161717501088 is a wasteful number, since it uses less digits than its factorization.

161717501088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3926747 (or 3926736 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 45.

The spelling of 161717501088 in words is "one hundred sixty-one billion, seven hundred seventeen million, five hundred one thousand, eighty-eight".