1228447526688 has 72 divisors (see below), whose sum is σ = 3622782775248. Its totient is φ = 409482506304.

The previous prime is 1228447526641. The next prime is 1228447526707. The reversal of 1228447526688 is 8866257448221.

It is a happy number.

1228447526688 is a `hidden beast` number, since 1 + 2 + 2 + 8 + 4 + 47 + 526 + 68 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×1228447526688³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78981906 + ... + 78997457.

It is an arithmetic number, because the mean of its divisors is an integer number (50316427434).

Almost surely, 2^{1228447526688} is an apocalyptic number.

1228447526688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1228447526688 is an abundant number, since it is smaller than the sum of its proper divisors (2394335248560).

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

1228447526688 is an equidigital number, since it uses as much as digits as its factorization.

1228447526688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157979388 (or 157979368 counting only the distinct ones).

The product of its digits is 82575360, while the sum is 63.

The spelling of 1228447526688 in words is "one trillion, two hundred twenty-eight billion, four hundred forty-seven million, five hundred twenty-six thousand, six hundred eighty-eight".