1123640280361 has 3 divisors (see below), whose sum is σ = 1123641340381. Its totient is φ = 1123639220342.

The previous prime is 1123640280353. The next prime is 1123640280383. The reversal of 1123640280361 is 1630820463211.

The square root of 1123640280361 is 1060019.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1123640280361 - 2³ = 1123640280353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123640280361.

It is not an unprimeable number, because it can be changed into a prime (1123640280331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 530010 + ... + 1590028.

Almost surely, 2^{1123640280361} is an apocalyptic number.

1123640280361 is the 1060019-th square number.

1123640280361 is the 530010-th centered octagonal number.

It is an amenable number.

1123640280361 is a deficient number, since it is larger than the sum of its proper divisors (1060020).

1123640280361 is an frugal number, since it uses more digits than its factorization.

1123640280361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120038 (or 1060019 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 1123640280361 in words is "one trillion, one hundred twenty-three billion, six hundred forty million, two hundred eighty thousand, three hundred sixty-one".