1641343140 has 36 divisors (see below), whose sum is σ = 4978741404. Its totient is φ = 437691456.

The previous prime is 1641343097. The next prime is 1641343141. The reversal of 1641343140 is 413431461.

1641343140 is a `hidden beast` number, since 1 + 641 + 3 + 4 + 3 + 14 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 738100224 + 903242916 = 27168^2 + 30054^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1641343141) 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, 4559107 + ... + 4559466.

Almost surely, 2^1641343140 is an apocalyptic number.

1641343140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641343140 is an abundant number, since it is smaller than the sum of its proper divisors (3337398264).

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

1641343140 is a wasteful number, since it uses less digits than its factorization.

1641343140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9118588 (or 9118583 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1641343140 is about 40513.4933077857. The cubic root of 1641343140 is about 1179.5955570751.

The spelling of 1641343140 in words is "one billion, six hundred forty-one million, three hundred forty-three thousand, one hundred forty".