216188878160 has 40 divisors (see below), whose sum is σ = 503173471176. Its totient is φ = 86383623680.

The previous prime is 216188878153. The next prime is 216188878193. The reversal of 216188878160 is 61878881612.

It can be written as a sum of positive squares in 4 ways, for example, as 146119744 + 216042758416 = 12088^2 + 464804^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 216188878096 and 216188878105.

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, 1360619 + ... + 1511178.

Almost surely, 2^216188878160 is an apocalyptic number.

216188878160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216188878160 is an abundant number, since it is smaller than the sum of its proper divisors (286984593016).

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

216188878160 is a wasteful number, since it uses less digits than its factorization.

216188878160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872751 (or 2872745 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 56.

The spelling of 216188878160 in words is "two hundred sixteen billion, one hundred eighty-eight million, eight hundred seventy-eight thousand, one hundred sixty".