1641870552 has 128 divisors (see below), whose sum is σ = 4814899200. Its totient is φ = 456826368.

The previous prime is 1641870539. The next prime is 1641870563. The reversal of 1641870552 is 2550781461.

It is a self number, because there is not a number n which added to its sum of digits gives 1641870552.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 2123638 + ... + 2124410.

It is an arithmetic number, because the mean of its divisors is an integer number (37616400).

Almost surely, 2^1641870552 is an apocalyptic number.

1641870552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641870552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407449600).

1641870552 is an abundant number, since it is smaller than the sum of its proper divisors (3173028648).

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

1641870552 is a wasteful number, since it uses less digits than its factorization.

1641870552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 1641870552 is about 40520.0018756169. The cubic root of 1641870552 is about 1179.7218898351.

The spelling of 1641870552 in words is "one billion, six hundred forty-one million, eight hundred seventy thousand, five hundred fifty-two".