1641934872 has 48 divisors (see below), whose sum is σ = 4555376280. Its totient is φ = 533961600.

The previous prime is 1641934849. The next prime is 1641934873. The reversal of 1641934872 is 2784391461.

1641934872 is a `hidden beast` number, since 164 + 1 + 9 + 3 + 487 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641934873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275154 + ... + 281057.

Almost surely, 2^1641934872 is an apocalyptic number.

1641934872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1641934872 is an abundant number, since it is smaller than the sum of its proper divisors (2913441408).

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

1641934872 is a wasteful number, since it uses less digits than its factorization.

1641934872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556264 (or 556257 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1641934872 is about 40520.7955499395. The cubic root of 1641934872 is about 1179.7372947688.

The spelling of 1641934872 in words is "one billion, six hundred forty-one million, nine hundred thirty-four thousand, eight hundred seventy-two".