1121664545 has 4 divisors (see below), whose sum is σ = 1345997460. Its totient is φ = 897331632.

The previous prime is 1121664527. The next prime is 1121664553. The reversal of 1121664545 is 5454661211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 675948001 + 445716544 = 25999^2 + 21112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121664545 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112166450 + ... + 112166459.

It is an arithmetic number, because the mean of its divisors is an integer number (336499365).

Almost surely, 2^1121664545 is an apocalyptic number.

It is an amenable number.

1121664545 is a deficient number, since it is larger than the sum of its proper divisors (224332915).

1121664545 is an equidigital number, since it uses as much as digits as its factorization.

1121664545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224332914.

The product of its digits is 28800, while the sum is 35.

The square root of 1121664545 is about 33491.2607257475. The cubic root of 1121664545 is about 1039.0130383352.

The spelling of 1121664545 in words is "one billion, one hundred twenty-one million, six hundred sixty-four thousand, five hundred forty-five".