228661126661647 has 32 divisors (see below), whose sum is σ = 239619004275200. Its totient is φ = 218069199216000.

The previous prime is 228661126661633. The next prime is 228661126661683. The reversal of 228661126661647 is 746166621166822.

It is a cyclic number.

It is not a de Polignac number, because 228661126661647 - 2³¹ = 228658979177999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228661126661047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65568304 + ... + 68967562.

It is an arithmetic number, because the mean of its divisors is an integer number (7488093883600).

Almost surely, 2^{228661126661647} is an apocalyptic number.

228661126661647 is a deficient number, since it is larger than the sum of its proper divisors (10957877613553).

228661126661647 is a wasteful number, since it uses less digits than its factorization.

228661126661647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399647.

The product of its digits is 83607552, while the sum is 64.

The spelling of 228661126661647 in words is "two hundred twenty-eight trillion, six hundred sixty-one billion, one hundred twenty-six million, six hundred sixty-one thousand, six hundred forty-seven".