1223613604553 has 4 divisors (see below), whose sum is σ = 1223616924288. Its totient is φ = 1223610284820.

The previous prime is 1223613604531. The next prime is 1223613604561. The reversal of 1223613604553 is 3554063163221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1223613604553 - 2⁶ = 1223613604489 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 1223613604553.

It is not an unprimeable number, because it can be changed into a prime (1223613609553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026401 + ... + 1871022.

It is an arithmetic number, because the mean of its divisors is an integer number (305904231072).

Almost surely, 2^{1223613604553} is an apocalyptic number.

It is an amenable number.

1223613604553 is a deficient number, since it is larger than the sum of its proper divisors (3319735).

1223613604553 is an equidigital number, since it uses as much as digits as its factorization.

1223613604553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319734.

The product of its (nonzero) digits is 388800, while the sum is 41.

Adding to 1223613604553 its reverse (3554063163221), we get a palindrome (4777676767774).

The spelling of 1223613604553 in words is "one trillion, two hundred twenty-three billion, six hundred thirteen million, six hundred four thousand, five hundred fifty-three".