1641840436420 has 24 divisors (see below), whose sum is σ = 3448435725504. Its totient is φ = 656627449056.

The previous prime is 1641840436343. The next prime is 1641840436471. The reversal of 1641840436420 is 246340481461.

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 7 ways as a sum of consecutive naturals, for example, 6671464 + ... + 6913183.

It is an arithmetic number, because the mean of its divisors is an integer number (143684821896).

Almost surely, 2^{1641840436420} is an apocalyptic number.

1641840436420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641840436420 is an abundant number, since it is smaller than the sum of its proper divisors (1806595289084).

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

1641840436420 is a wasteful number, since it uses less digits than its factorization.

1641840436420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13590699 (or 13590697 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 43.

The spelling of 1641840436420 in words is "one trillion, six hundred forty-one billion, eight hundred forty million, four hundred thirty-six thousand, four hundred twenty".