161641676 has 24 divisors (see below), whose sum is σ = 324441600. Its totient is φ = 69026832.

The previous prime is 161641633. The next prime is 161641681. The reversal of 161641676 is 676146161.

It is a super-2 number, since 2×161641676² = 52256062840177952, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276 + ... + 18123.

It is an arithmetic number, because the mean of its divisors is an integer number (13518400).

Almost surely, 2^161641676 is an apocalyptic number.

It is an amenable number.

161641676 is an abundant number, since it is smaller than the sum of its proper divisors (162799924).

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

161641676 is a wasteful number, since it uses less digits than its factorization.

161641676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20693 (or 20691 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 161641676 is about 12713.8379728546. The cubic root of 161641676 is about 544.7339565075.

The spelling of 161641676 in words is "one hundred sixty-one million, six hundred forty-one thousand, six hundred seventy-six".