1881660216 has 32 divisors (see below), whose sum is σ = 4705603200. Its totient is φ = 627026400.

The previous prime is 1881660203. The next prime is 1881660251. The reversal of 1881660216 is 6120661881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82245 + ... + 102603.

It is an arithmetic number, because the mean of its divisors is an integer number (147050100).

Almost surely, 2^1881660216 is an apocalyptic number.

It is an amenable number.

1881660216 is an abundant number, since it is smaller than the sum of its proper divisors (2823942984).

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

1881660216 is a wasteful number, since it uses less digits than its factorization.

1881660216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24219 (or 24215 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1881660216 is about 43378.1075659139. The cubic root of 1881660216 is about 1234.5643567187.

The spelling of 1881660216 in words is "one billion, eight hundred eighty-one million, six hundred sixty thousand, two hundred sixteen".