2223577778 has 4 divisors (see below), whose sum is σ = 3335366670. Its totient is φ = 1111788888.

The previous prime is 2223577777. The next prime is 2223577793. The reversal of 2223577778 is 8777753222.

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., 1143995329 + 1079582449 = 33823^2 + 32857^2 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2223577777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555894443 + ... + 555894446.

Almost surely, 2^2223577778 is an apocalyptic number.

2223577778 is a deficient number, since it is larger than the sum of its proper divisors (1111788892).

2223577778 is a wasteful number, since it uses less digits than its factorization.

2223577778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111788891.

The product of its digits is 2304960, while the sum is 50.

The square root of 2223577778 is about 47154.8277273918. The cubic root of 2223577778 is about 1305.2211675277.

The spelling of 2223577778 in words is "two billion, two hundred twenty-three million, five hundred seventy-seven thousand, seven hundred seventy-eight".