21744714166755 has 16 divisors (see below), whose sum is σ = 34791644603904. Its totient is φ = 11597146909920.

The previous prime is 21744714166717. The next prime is 21744714166801. The reversal of 21744714166755 is 55766141744712.

It is not a de Polignac number, because 21744714166755 - 2⁶ = 21744714166691 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3677760 + ... + 7550850.

It is an arithmetic number, because the mean of its divisors is an integer number (2174477787744).

Almost surely, 2^{21744714166755} is an apocalyptic number.

21744714166755 is a deficient number, since it is larger than the sum of its proper divisors (13046930437149).

21744714166755 is a wasteful number, since it uses less digits than its factorization.

21744714166755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247386.

The product of its digits is 39513600, while the sum is 60.

The spelling of 21744714166755 in words is "twenty-one trillion, seven hundred forty-four billion, seven hundred fourteen million, one hundred sixty-six thousand, seven hundred fifty-five".