1223513454544 has 20 divisors (see below), whose sum is σ = 2495323493440. Its totient is φ = 579559004640.

The previous prime is 1223513454529. The next prime is 1223513454589. The reversal of 1223513454544 is 4454543153221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223513454544.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012357352 + ... + 2012357959.

It is an arithmetic number, because the mean of its divisors is an integer number (124766174672).

Almost surely, 2^{1223513454544} is an apocalyptic number.

It is an amenable number.

1223513454544 is an abundant number, since it is smaller than the sum of its proper divisors (1271810038896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223513454544 is a wasteful number, since it uses less digits than its factorization.

1223513454544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024715338 (or 4024715332 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 43.

The spelling of 1223513454544 in words is "one trillion, two hundred twenty-three billion, five hundred thirteen million, four hundred fifty-four thousand, five hundred forty-four".