1881545680 has 160 divisors (see below), whose sum is σ = 5297160960. Its totient is φ = 607150080.

The previous prime is 1881545663. The next prime is 1881545717. The reversal of 1881545680 is 865451881.

It is a self number, because there is not a number n which added to its sum of digits gives 1881545680.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 1925352 + ... + 1926328.

It is an arithmetic number, because the mean of its divisors is an integer number (33107256).

Almost surely, 2^1881545680 is an apocalyptic number.

1881545680 is a gapful number since it is divisible by the number (10) 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 1881545680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2648580480).

1881545680 is an abundant number, since it is smaller than the sum of its proper divisors (3415615280).

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

1881545680 is a wasteful number, since it uses less digits than its factorization.

1881545680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 46.

The square root of 1881545680 is about 43376.7873406964. The cubic root of 1881545680 is about 1234.5393070434.

The spelling of 1881545680 in words is "one billion, eight hundred eighty-one million, five hundred forty-five thousand, six hundred eighty".