1123777656 has 144 divisors (see below), whose sum is σ = 3297364200. Its totient is φ = 345566208.

The previous prime is 1123777649. The next prime is 1123777657. The reversal of 1123777656 is 6567773211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123777657) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1102315 + ... + 1103333.

Almost surely, 2^1123777656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123777656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648682100).

1123777656 is an abundant number, since it is smaller than the sum of its proper divisors (2173586544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123777656 is a wasteful number, since it uses less digits than its factorization.

1123777656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1094 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 1123777656 is about 33522.7930817228. The cubic root of 1123777656 is about 1039.6650968004.

The spelling of 1123777656 in words is "one billion, one hundred twenty-three million, seven hundred seventy-seven thousand, six hundred fifty-six".