1641164420 has 48 divisors (see below), whose sum is σ = 3941578368. Its totient is φ = 562287360.

The previous prime is 1641164417. The next prime is 1641164449. The reversal of 1641164420 is 244611461.

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 15 ways as a sum of consecutive naturals, for example, 250304 + ... + 256776.

It is an arithmetic number, because the mean of its divisors is an integer number (82116216).

Almost surely, 2^1641164420 is an apocalyptic number.

1641164420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641164420 is an abundant number, since it is smaller than the sum of its proper divisors (2300413948).

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

1641164420 is a wasteful number, since it uses less digits than its factorization.

1641164420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300 (or 8298 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1641164420 is about 40511.2875628509. The cubic root of 1641164420 is about 1179.5527415368.

Adding to 1641164420 its reverse (244611461), we get a palindrome (1885775881).

The spelling of 1641164420 in words is "one billion, six hundred forty-one million, one hundred sixty-four thousand, four hundred twenty".