1123403153618 has 4 divisors (see below), whose sum is σ = 1685104730430. Its totient is φ = 561701576808.

The previous prime is 1123403153513. The next prime is 1123403153623. The reversal of 1123403153618 is 8163513043211.

It is a happy number.

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., 1120936740049 + 2466413569 = 1058743^2 + 49663^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280850788403 + ... + 280850788406.

Almost surely, 2^{1123403153618} is an apocalyptic number.

1123403153618 is a deficient number, since it is larger than the sum of its proper divisors (561701576812).

1123403153618 is an equidigital number, since it uses as much as digits as its factorization.

1123403153618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561701576811.

The product of its (nonzero) digits is 51840, while the sum is 38.

Adding to 1123403153618 its reverse (8163513043211), we get a palindrome (9286916196829).

The spelling of 1123403153618 in words is "one trillion, one hundred twenty-three billion, four hundred three million, one hundred fifty-three thousand, six hundred eighteen".