11234557778 has 4 divisors (see below), whose sum is σ = 16851836670. Its totient is φ = 5617278888.

The previous prime is 11234557771. The next prime is 11234557787. The reversal of 11234557778 is 87775543211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87775543211 = 3673 ⋅23897507.

It can be written as a sum of positive squares in only one way, i.e., 5926998169 + 5307559609 = 76987^2 + 72853^2 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11234557771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2808639443 + ... + 2808639446.

Almost surely, 2^11234557778 is an apocalyptic number.

11234557778 is a deficient number, since it is larger than the sum of its proper divisors (5617278892).

11234557778 is an equidigital number, since it uses as much as digits as its factorization.

11234557778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617278891.

The product of its digits is 1646400, while the sum is 50.

The spelling of 11234557778 in words is "eleven billion, two hundred thirty-four million, five hundred fifty-seven thousand, seven hundred seventy-eight".