1641056164 has 24 divisors (see below), whose sum is σ = 3269141568. Its totient is φ = 713502240.

The previous prime is 1641056161. The next prime is 1641056243. The reversal of 1641056164 is 4616501461.

It is not an unprimeable number, because it can be changed into a prime (1641056161) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 809787 + ... + 811810.

It is an arithmetic number, because the mean of its divisors is an integer number (136214232).

Almost surely, 2^1641056164 is an apocalyptic number.

It is an amenable number.

1641056164 is a deficient number, since it is larger than the sum of its proper divisors (1628085404).

1641056164 is a wasteful number, since it uses less digits than its factorization.

1641056164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621635 (or 1621633 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1641056164 is about 40509.9514193735. The cubic root of 1641056164 is about 1179.5268053848.

The spelling of 1641056164 in words is "one billion, six hundred forty-one million, fifty-six thousand, one hundred sixty-four".