11688532553 has 2 divisors, whose sum is σ = 11688532554. Its totient is φ = 11688532552.

The previous prime is 11688532543. The next prime is 11688532561. The reversal of 11688532553 is 35523588611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6748129609 + 4940402944 = 82147^2 + 70288^2 .

It is a cyclic number.

It is not a de Polignac number, because 11688532553 - 2¹² = 11688528457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11688532498 and 11688532507.

It is not a weakly prime, because it can be changed into another prime (11688532543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5844266276 + 5844266277.

It is an arithmetic number, because the mean of its divisors is an integer number (5844266277).

Almost surely, 2^11688532553 is an apocalyptic number.

It is an amenable number.

11688532553 is a deficient number, since it is larger than the sum of its proper divisors (1).

11688532553 is an equidigital number, since it uses as much as digits as its factorization.

11688532553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864000, while the sum is 47.

The spelling of 11688532553 in words is "eleven billion, six hundred eighty-eight million, five hundred thirty-two thousand, five hundred fifty-three".