1344781477789 has 4 divisors (see below), whose sum is σ = 1344868528480. Its totient is φ = 1344694427100.

The previous prime is 1344781477727. The next prime is 1344781477807. The reversal of 1344781477789 is 9877741874431.

It is a happy number.

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 1344781477789 - 2¹⁹ = 1344780953501 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 (1344781477489) by changing a digit.

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, 43502169 + ... + 43533070.

It is an arithmetic number, because the mean of its divisors is an integer number (336217132120).

Almost surely, 2^{1344781477789} is an apocalyptic number.

It is an amenable number.

1344781477789 is a deficient number, since it is larger than the sum of its proper divisors (87050691).

1344781477789 is an equidigital number, since it uses as much as digits as its factorization.

1344781477789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87050690.

The product of its digits is 265531392, while the sum is 70.

The spelling of 1344781477789 in words is "one trillion, three hundred forty-four billion, seven hundred eighty-one million, four hundred seventy-seven thousand, seven hundred eighty-nine".