6557560649611 has 4 divisors (see below), whose sum is σ = 6697083216672. Its totient is φ = 6418038082552.

The previous prime is 6557560649567. The next prime is 6557560649671. The reversal of 6557560649611 is 1169460657556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6557560649611 - 2²⁵ = 6557527095179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6557560649611.

It is not an unprimeable number, because it can be changed into a prime (6557560649671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69761283460 + ... + 69761283553.

It is an arithmetic number, because the mean of its divisors is an integer number (1674270804168).

Almost surely, 2^{6557560649611} is an apocalyptic number.

6557560649611 is a deficient number, since it is larger than the sum of its proper divisors (139522567061).

6557560649611 is a wasteful number, since it uses less digits than its factorization.

6557560649611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139522567060.

The product of its (nonzero) digits is 40824000, while the sum is 61.

The spelling of 6557560649611 in words is "six trillion, five hundred fifty-seven billion, five hundred sixty million, six hundred forty-nine thousand, six hundred eleven".