226646664525 has 72 divisors (see below), whose sum is σ = 420151680000. Its totient is φ = 116653299840.

The previous prime is 226646664521. The next prime is 226646664539. The reversal of 226646664525 is 525466646622.

It is not a de Polignac number, because 226646664525 - 2² = 226646664521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226646664521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15646236 + ... + 15660714.

It is an arithmetic number, because the mean of its divisors is an integer number (5835440000).

Almost surely, 2^226646664525 is an apocalyptic number.

226646664525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

226646664525 is a deficient number, since it is larger than the sum of its proper divisors (193505015475).

226646664525 is a wasteful number, since it uses less digits than its factorization.

226646664525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16923 (or 16915 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 54.

The spelling of 226646664525 in words is "two hundred twenty-six billion, six hundred forty-six million, six hundred sixty-four thousand, five hundred twenty-five".