216655184025 has 96 divisors (see below), whose sum is σ = 457760026880. Its totient is φ = 98411189760.

The previous prime is 216655184003. The next prime is 216655184089. The reversal of 216655184025 is 520481556612.

216655184025 is a `hidden beast` number, since 2 + 16 + 6 + 551 + 84 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 216655184025 - 2⁷ = 216655183897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 595797 + ... + 887853.

Almost surely, 2^216655184025 is an apocalyptic number.

216655184025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216655184025 is an abundant number, since it is smaller than the sum of its proper divisors (241104842855).

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

216655184025 is a wasteful number, since it uses less digits than its factorization.

216655184025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292240 (or 292229 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 216655184025 in words is "two hundred sixteen billion, six hundred fifty-five million, one hundred eighty-four thousand, twenty-five".