1631642166 has 72 divisors (see below), whose sum is σ = 4440984912. Its totient is φ = 423799200.

The previous prime is 1631642093. The next prime is 1631642179. The reversal of 1631642166 is 6612461361.

It is a happy number.

1631642166 is a `hidden beast` number, since 1 + 6 + 3 + 1 + 642 + 1 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1631642166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38265 + ... + 68756.

It is an arithmetic number, because the mean of its divisors is an integer number (61680346).

Almost surely, 2^1631642166 is an apocalyptic number.

1631642166 is an abundant number, since it is smaller than the sum of its proper divisors (2809342746).

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

1631642166 is a wasteful number, since it uses less digits than its factorization.

1631642166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107058 (or 107044 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1631642166 is about 40393.5906549542. The cubic root of 1631642166 is about 1177.2670078719.

The spelling of 1631642166 in words is "one billion, six hundred thirty-one million, six hundred forty-two thousand, one hundred sixty-six".