1123654646018 has 4 divisors (see below), whose sum is σ = 1685481969030. Its totient is φ = 561827323008.

The previous prime is 1123654645991. The next prime is 1123654646027. The reversal of 1123654646018 is 8106464563211.

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., 969639998209 + 154014647809 = 984703^2 + 392447^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280913661503 + ... + 280913661506.

Almost surely, 2^{1123654646018} is an apocalyptic number.

1123654646018 is a deficient number, since it is larger than the sum of its proper divisors (561827323012).

1123654646018 is an equidigital number, since it uses as much as digits as its factorization.

1123654646018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561827323011.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 1123654646018 in words is "one trillion, one hundred twenty-three billion, six hundred fifty-four million, six hundred forty-six thousand, eighteen".