1156217216705 has 32 divisors (see below), whose sum is σ = 1434827018880. Its totient is φ = 893762380800.

The previous prime is 1156217216653. The next prime is 1156217216731. The reversal of 1156217216705 is 5076127126511.

It is not a de Polignac number, because 1156217216705 - 2¹⁶ = 1156217151169 is a prime.

It is a Curzon 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, 16805666 + ... + 16874324.

It is an arithmetic number, because the mean of its divisors is an integer number (44838344340).

Almost surely, 2^{1156217216705} is an apocalyptic number.

It is an amenable number.

1156217216705 is a deficient number, since it is larger than the sum of its proper divisors (278609802175).

1156217216705 is a wasteful number, since it uses less digits than its factorization.

1156217216705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69329.

The product of its (nonzero) digits is 176400, while the sum is 44.

The spelling of 1156217216705 in words is "one trillion, one hundred fifty-six billion, two hundred seventeen million, two hundred sixteen thousand, seven hundred five".