1641569984 has 112 divisors (see below), whose sum is σ = 3502517760. Its totient is φ = 761671680.

The previous prime is 1641569983. The next prime is 1641570017. The reversal of 1641569984 is 4899651461.

It is not an unprimeable number, because it can be changed into a prime (1641569983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11809787 + ... + 11809925.

It is an arithmetic number, because the mean of its divisors is an integer number (31272480).

Almost surely, 2^1641569984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641569984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1751258880).

1641569984 is an abundant number, since it is smaller than the sum of its proper divisors (1860947776).

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

1641569984 is a wasteful number, since it uses less digits than its factorization.

1641569984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 348 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The square root of 1641569984 is about 40516.2928215305. The cubic root of 1641569984 is about 1179.6498970932.

The spelling of 1641569984 in words is "one billion, six hundred forty-one million, five hundred sixty-nine thousand, nine hundred eighty-four".