1244456913589 has 4 divisors (see below), whose sum is σ = 1244766407020. Its totient is φ = 1244147420160.

The previous prime is 1244456913563. The next prime is 1244456913607. The reversal of 1244456913589 is 9853196544421.

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 64663404100 + 1179793509489 = 254290^2 + 1086183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244456913589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244456913559) 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, 154740684 + ... + 154748725.

It is an arithmetic number, because the mean of its divisors is an integer number (311191601755).

Almost surely, 2^{1244456913589} is an apocalyptic number.

It is an amenable number.

1244456913589 is a deficient number, since it is larger than the sum of its proper divisors (309493431).

1244456913589 is an equidigital number, since it uses as much as digits as its factorization.

1244456913589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309493430.

The product of its digits is 37324800, while the sum is 61.

The spelling of 1244456913589 in words is "one trillion, two hundred forty-four billion, four hundred fifty-six million, nine hundred thirteen thousand, five hundred eighty-nine".