216449398650 has 48 divisors (see below), whose sum is σ = 538332732000. Its totient is φ = 57554439360.

The previous prime is 216449398573. The next prime is 216449398679. The reversal of 216449398650 is 56893944612.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2014980 + ... + 2119679.

It is an arithmetic number, because the mean of its divisors is an integer number (11215265250).

Almost surely, 2^216449398650 is an apocalyptic number.

216449398650 is an abundant number, since it is smaller than the sum of its proper divisors (321883333350).

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

216449398650 is a wasteful number, since it uses less digits than its factorization.

216449398650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135023 (or 4135018 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 216449398650 in words is "two hundred sixteen billion, four hundred forty-nine million, three hundred ninety-eight thousand, six hundred fifty".