1641484840 has 16 divisors (see below), whose sum is σ = 3693340980. Its totient is φ = 656593920.

The previous prime is 1641484829. The next prime is 1641484877. The reversal of 1641484840 is 484841461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1578155076 + 63329764 = 39726^2 + 7958^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 41037121 = 1641484840 / (1 + 6 + 4 + 1 + 4 + 8 + 4 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1641484793 and 1641484802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20518521 + ... + 20518600.

Almost surely, 2^1641484840 is an apocalyptic number.

1641484840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641484840 is an abundant number, since it is smaller than the sum of its proper divisors (2051856140).

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

1641484840 is a wasteful number, since it uses less digits than its factorization.

1641484840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41037132 (or 41037128 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 1641484840 is about 40515.2420701148. The cubic root of 1641484840 is about 1179.6295016083.

The spelling of 1641484840 in words is "one billion, six hundred forty-one million, four hundred eighty-four thousand, eight hundred forty".