1641671406 has 48 divisors (see below), whose sum is σ = 3703544208. Its totient is φ = 525110400.

The previous prime is 1641671399. The next prime is 1641671417. The reversal of 1641671406 is 6041761461.

It is a happy number.

1641671406 is a `hidden beast` number, since 1 + 641 + 6 + 7 + 1 + 4 + 0 + 6 = 666.

It is a super-3 number, since 3×1641671406³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26785 + ... + 63251.

It is an arithmetic number, because the mean of its divisors is an integer number (77157171).

Almost surely, 2^1641671406 is an apocalyptic number.

1641671406 is an abundant number, since it is smaller than the sum of its proper divisors (2061872802).

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

1641671406 is a wasteful number, since it uses less digits than its factorization.

1641671406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36577 (or 36574 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1641671406 is about 40517.5444221389. The cubic root of 1641671406 is about 1179.6741909073.

The spelling of 1641671406 in words is "one billion, six hundred forty-one million, six hundred seventy-one thousand, four hundred six".