1641843140 has 24 divisors (see below), whose sum is σ = 3940423872. Its totient is φ = 562917600.

The previous prime is 1641843131. The next prime is 1641843167. The reversal of 1641843140 is 413481461.

It is a junction number, because it is equal to n+sod(n) for n = 1641843097 and 1641843106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5863586 + ... + 5863865.

It is an arithmetic number, because the mean of its divisors is an integer number (164184328).

Almost surely, 2^1641843140 is an apocalyptic number.

1641843140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641843140 is an abundant number, since it is smaller than the sum of its proper divisors (2298580732).

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

1641843140 is a wasteful number, since it uses less digits than its factorization.

1641843140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11727467 (or 11727465 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1641843140 is about 40519.6636215060. The cubic root of 1641843140 is about 1179.7153244137.

The spelling of 1641843140 in words is "one billion, six hundred forty-one million, eight hundred forty-three thousand, one hundred forty".