11567855554 has 4 divisors (see below), whose sum is σ = 17351783334. Its totient is φ = 5783927776.

The previous prime is 11567855483. The next prime is 11567855569. The reversal of 11567855554 is 45555876511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45555876511 = 43573 ⋅1045507.

It can be written as a sum of positive squares in only one way, i.e., 10787938225 + 779917329 = 103865^2 + 27927^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2891963887 + ... + 2891963890.

Almost surely, 2^11567855554 is an apocalyptic number.

11567855554 is a deficient number, since it is larger than the sum of its proper divisors (5783927780).

11567855554 is an equidigital number, since it uses as much as digits as its factorization.

11567855554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5783927779.

The product of its digits is 4200000, while the sum is 52.

The spelling of 11567855554 in words is "eleven billion, five hundred sixty-seven million, eight hundred fifty-five thousand, five hundred fifty-four".