228661126661646 has 40 divisors (see below), whose sum is σ = 585566059813680. Its totient is φ = 65331750474432.

The previous prime is 228661126661633. The next prime is 228661126661683. The reversal of 228661126661646 is 646166621166822.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 100820601451 + ... + 100820603718.

It is an arithmetic number, because the mean of its divisors is an integer number (14639151495342).

Almost surely, 2^{228661126661646} is an apocalyptic number.

228661126661646 is an abundant number, since it is smaller than the sum of its proper divisors (356904933152034).

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

228661126661646 is a wasteful number, since it uses less digits than its factorization.

228661126661646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201641205190 (or 201641205181 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 63.

The spelling of 228661126661646 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-six".