6569742479655 has 16 divisors (see below), whose sum is σ = 10767968162784. Its totient is φ = 3418402590720.

The previous prime is 6569742479623. The next prime is 6569742479659. The reversal of 6569742479655 is 5569742479656.

It is not a de Polignac number, because 6569742479655 - 2⁵ = 6569742479623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6569742479659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5341253434 + ... + 5341254663.

It is an arithmetic number, because the mean of its divisors is an integer number (672998010174).

Almost surely, 2^{6569742479655} is an apocalyptic number.

6569742479655 is a deficient number, since it is larger than the sum of its proper divisors (4198225683129).

6569742479655 is a wasteful number, since it uses less digits than its factorization.

6569742479655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10682508146.

The product of its digits is 3429216000, while the sum is 75.

Subtracting from 6569742479655 its reverse (5569742479656), we obtain a palindrome (999999999999).

The spelling of 6569742479655 in words is "six trillion, five hundred sixty-nine billion, seven hundred forty-two million, four hundred seventy-nine thousand, six hundred fifty-five".