11505600553 has 2 divisors, whose sum is σ = 11505600554. Its totient is φ = 11505600552.

The previous prime is 11505600551. The next prime is 11505600571. The reversal of 11505600553 is 35500650511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10069721104 + 1435879449 = 100348^2 + 37893^2 .

It is a cyclic number.

It is not a de Polignac number, because 11505600553 - 2¹ = 11505600551 is a prime.

It is a super-4 number, since 4×11505600553⁴ (a number of 41 digits) contains 4444 as substring.

Together with 11505600551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11505600551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752800276 + 5752800277.

It is an arithmetic number, because the mean of its divisors is an integer number (5752800277).

Almost surely, 2^11505600553 is an apocalyptic number.

It is an amenable number.

11505600553 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505600553 is an equidigital number, since it uses as much as digits as its factorization.

11505600553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 11505600553 in words is "eleven billion, five hundred five million, six hundred thousand, five hundred fifty-three".