11222356777778 has 4 divisors (see below), whose sum is σ = 16833535166670. Its totient is φ = 5611178388888.

The previous prime is 11222356777741. The next prime is 11222356777781. The reversal of 11222356777778 is 87777765322211.

11222356777778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10980919180009 + 241437597769 = 3313747^2 + 491363^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805589194443 + ... + 2805589194446.

Almost surely, 2^{11222356777778} is an apocalyptic number.

11222356777778 is a deficient number, since it is larger than the sum of its proper divisors (5611178388892).

11222356777778 is an equidigital number, since it uses as much as digits as its factorization.

11222356777778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611178388891.

The product of its digits is 96808320, while the sum is 65.

The spelling of 11222356777778 in words is "eleven trillion, two hundred twenty-two billion, three hundred fifty-six million, seven hundred seventy-seven thousand, seven hundred seventy-eight".