1641512466 has 80 divisors (see below), whose sum is σ = 4050557280. Its totient is φ = 492721920.

The previous prime is 1641512441. The next prime is 1641512471. The reversal of 1641512466 is 6642151461.

1641512466 is a `hidden beast` number, since 1 + 641 + 5 + 1 + 2 + 4 + 6 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641512466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 186370 + ... + 194978.

It is an arithmetic number, because the mean of its divisors is an integer number (50631966).

Almost surely, 2^1641512466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641512466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025278640).

1641512466 is an abundant number, since it is smaller than the sum of its proper divisors (2409044814).

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

1641512466 is a wasteful number, since it uses less digits than its factorization.

1641512466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8741 (or 8732 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1641512466 is about 40515.5830020993. The cubic root of 1641512466 is about 1179.6361192472.

The spelling of 1641512466 in words is "one billion, six hundred forty-one million, five hundred twelve thousand, four hundred sixty-six".