228366506636646 has 32 divisors (see below), whose sum is σ = 522008890737408. Its totient is φ = 65244035307360.

The previous prime is 228366506636579. The next prime is 228366506636647. The reversal of 228366506636646 is 646636605663822.

It is a happy number.

It is a super-3 number, since 3×228366506636646³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228366506636647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146633565 + ... + 148182776.

It is an arithmetic number, because the mean of its divisors is an integer number (16312777835544).

Almost surely, 2^{228366506636646} is an apocalyptic number.

228366506636646 is an abundant number, since it is smaller than the sum of its proper divisors (293642384100762).

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

228366506636646 is a wasteful number, since it uses less digits than its factorization.

228366506636646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294834796.

The product of its (nonzero) digits is 1612431360, while the sum is 69.

The spelling of 228366506636646 in words is "two hundred twenty-eight trillion, three hundred sixty-six billion, five hundred six million, six hundred thirty-six thousand, six hundred forty-six".