1229129035568 has 640 divisors, whose sum is σ = 3184558080000. Its totient is φ = 457045908480.

The previous prime is 1229129035553. The next prime is 1229129035579. The reversal of 1229129035568 is 8655309219221.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5142799193 + ... + 5142799431.

It is an arithmetic number, because the mean of its divisors is an integer number (4975872000).

Almost surely, 2^{1229129035568} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229129035568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592279040000).

1229129035568 is an abundant number, since it is smaller than the sum of its proper divisors (1955429044432).

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

1229129035568 is a wasteful number, since it uses less digits than its factorization.

1229129035568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 1229129035568 in words is "one trillion, two hundred twenty-nine billion, one hundred twenty-nine million, thirty-five thousand, five hundred sixty-eight".