11811234778 has 8 divisors (see below), whose sum is σ = 20247831072. Its totient is φ = 5061957756.

The previous prime is 11811234719. The next prime is 11811234833. The reversal of 11811234778 is 87743211811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421829800 + ... + 421829827.

It is an arithmetic number, because the mean of its divisors is an integer number (2530978884).

Almost surely, 2^11811234778 is an apocalyptic number.

11811234778 is a deficient number, since it is larger than the sum of its proper divisors (8436596294).

11811234778 is an equidigital number, since it uses as much as digits as its factorization.

11811234778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843659636.

The product of its digits is 75264, while the sum is 43.

The spelling of 11811234778 in words is "eleven billion, eight hundred eleven million, two hundred thirty-four thousand, seven hundred seventy-eight".