11552556577 has 4 divisors (see below), whose sum is σ = 11555339796. Its totient is φ = 11549773360.

The previous prime is 11552556571. The next prime is 11552556611. The reversal of 11552556577 is 77565525511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77565525511 = 257297 ⋅301463.

It can be written as a sum of positive squares in 2 ways, for example, as 2548634256 + 9003922321 = 50484^2 + 94889^2 .

It is a cyclic number.

It is not a de Polignac number, because 11552556577 - 2¹⁵ = 11552523809 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 11552556577.

It is not an unprimeable number, because it can be changed into a prime (11552556571) 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, 1385374 + ... + 1393687.

It is an arithmetic number, because the mean of its divisors is an integer number (2888834949).

Almost surely, 2^11552556577 is an apocalyptic number.

It is an amenable number.

11552556577 is a deficient number, since it is larger than the sum of its proper divisors (2783219).

11552556577 is an equidigital number, since it uses as much as digits as its factorization.

11552556577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783218.

The product of its digits is 1837500, while the sum is 49.

The spelling of 11552556577 in words is "eleven billion, five hundred fifty-two million, five hundred fifty-six thousand, five hundred seventy-seven".