1646161198 has 48 divisors (see below), whose sum is σ = 2862266400. Its totient is φ = 708111360.

The previous prime is 1646161151. The next prime is 1646161201. The reversal of 1646161198 is 8911616461.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 538378 + ... + 541426.

It is an arithmetic number, because the mean of its divisors is an integer number (59630550).

Almost surely, 2^1646161198 is an apocalyptic number.

1646161198 is a deficient number, since it is larger than the sum of its proper divisors (1216105202).

1646161198 is a wasteful number, since it uses less digits than its factorization.

1646161198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193 (or 3182 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 1646161198 is about 40572.9121212663. The cubic root of 1646161198 is about 1180.7486386940.

The spelling of 1646161198 in words is "one billion, six hundred forty-six million, one hundred sixty-one thousand, one hundred ninety-eight".