1641471900 has 144 divisors (see below), whose sum is σ = 4912373088. Its totient is φ = 422912000.

The previous prime is 1641471893. The next prime is 1641471911. The reversal of 1641471900 is 91741461.

It is a super-2 number, since 2×1641471900² = 5388859996979220000, which contains 22 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 47 ways as a sum of consecutive naturals, for example, 1389310 + ... + 1390490.

It is an arithmetic number, because the mean of its divisors is an integer number (34113702).

Almost surely, 2^1641471900 is an apocalyptic number.

1641471900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641471900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2456186544).

1641471900 is an abundant number, since it is smaller than the sum of its proper divisors (3270901188).

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

1641471900 is a wasteful number, since it uses less digits than its factorization.

1641471900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1641471900 is about 40515.0823768137. The cubic root of 1641471900 is about 1179.6264018852.

The spelling of 1641471900 in words is "one billion, six hundred forty-one million, four hundred seventy-one thousand, nine hundred".