1228961234605 has 32 divisors (see below), whose sum is σ = 1615662526464. Its totient is φ = 891979070976.

The previous prime is 1228961234581. The next prime is 1228961234621. The reversal of 1228961234605 is 5064321698221.

It is a cyclic number.

It is not a de Polignac number, because 1228961234605 - 2¹⁷ = 1228961103533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187609 + ... + 1578961.

It is an arithmetic number, because the mean of its divisors is an integer number (50489453952).

Almost surely, 2^{1228961234605} is an apocalyptic number.

It is an amenable number.

1228961234605 is a deficient number, since it is larger than the sum of its proper divisors (386701291859).

1228961234605 is a wasteful number, since it uses less digits than its factorization.

1228961234605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391605.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 1228961234605 in words is "one trillion, two hundred twenty-eight billion, nine hundred sixty-one million, two hundred thirty-four thousand, six hundred five".