1245445223999 has 16 divisors (see below), whose sum is σ = 1254021785856. Its totient is φ = 1236899265600.

The previous prime is 1245445223947. The next prime is 1245445224031. The reversal of 1245445223999 is 9993225445421.

It is a cyclic number.

It is not a de Polignac number, because 1245445223999 - 2⁴⁰ = 145933596223 is a prime.

It is a super-2 number, since 2×1245445223999² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245445253999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229318814 + ... + 229324244.

It is an arithmetic number, because the mean of its divisors is an integer number (78376361616).

Almost surely, 2^{1245445223999} is an apocalyptic number.

1245445223999 is a deficient number, since it is larger than the sum of its proper divisors (8576561857).

1245445223999 is a wasteful number, since it uses less digits than its factorization.

1245445223999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7966.

The product of its digits is 27993600, while the sum is 59.

The spelling of 1245445223999 in words is "one trillion, two hundred forty-five billion, four hundred forty-five million, two hundred twenty-three thousand, nine hundred ninety-nine".