1881550816 has 48 divisors (see below), whose sum is σ = 3797251920. Its totient is φ = 917452800.

The previous prime is 1881550777. The next prime is 1881550817. The reversal of 1881550816 is 6180551881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881550817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212200 + ... + 220888.

It is an arithmetic number, because the mean of its divisors is an integer number (79109415).

Almost surely, 2^1881550816 is an apocalyptic number.

1881550816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1881550816 is an abundant number, since it is smaller than the sum of its proper divisors (1915701104).

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

1881550816 is a wasteful number, since it uses less digits than its factorization.

1881550816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8867 (or 8859 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 43.

The square root of 1881550816 is about 43376.8465428274. The cubic root of 1881550816 is about 1234.5404303376.

The spelling of 1881550816 in words is "one billion, eight hundred eighty-one million, five hundred fifty thousand, eight hundred sixteen".