1123641506564 has 24 divisors (see below), whose sum is σ = 2014546917600. Its totient is φ = 548059584320.

The previous prime is 1123641506557. The next prime is 1123641506569. The reversal of 1123641506564 is 4656051463211.

It is not an unprimeable number, because it can be changed into a prime (1123641506569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205267 + ... + 1923525.

It is an arithmetic number, because the mean of its divisors is an integer number (83939454900).

Almost surely, 2^{1123641506564} is an apocalyptic number.

It is an amenable number.

1123641506564 is a deficient number, since it is larger than the sum of its proper divisors (890905411036).

1123641506564 is a wasteful number, since it uses less digits than its factorization.

1123641506564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727843 (or 727841 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

Adding to 1123641506564 its reverse (4656051463211), we get a palindrome (5779692969775).

The spelling of 1123641506564 in words is "one trillion, one hundred twenty-three billion, six hundred forty-one million, five hundred six thousand, five hundred sixty-four".