216419775956 has 24 divisors (see below), whose sum is σ = 398942587680. Its totient is φ = 102444024672.

The previous prime is 216419775953. The next prime is 216419775977. The reversal of 216419775956 is 659577914612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216419775953) 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, 869486 + ... + 1090341.

It is an arithmetic number, because the mean of its divisors is an integer number (16622607820).

Almost surely, 2^216419775956 is an apocalyptic number.

It is an amenable number.

216419775956 is a deficient number, since it is larger than the sum of its proper divisors (182522811724).

216419775956 is a wasteful number, since it uses less digits than its factorization.

216419775956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961303 (or 1961301 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 62.

The spelling of 216419775956 in words is "two hundred sixteen billion, four hundred nineteen million, seven hundred seventy-five thousand, nine hundred fifty-six".