1388676954409 has 4 divisors (see below), whose sum is σ = 1436562366660. Its totient is φ = 1340791542160.

The previous prime is 1388676954391. The next prime is 1388676954433. The reversal of 1388676954409 is 9044596768831.

It is a happy number.

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 749272016025 + 639404938384 = 865605^2 + 799628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388676954409 - 2¹⁹ = 1388676430121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388676954479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23942706082 + ... + 23942706139.

It is an arithmetic number, because the mean of its divisors is an integer number (359140591665).

Almost surely, 2^{1388676954409} is an apocalyptic number.

It is an amenable number.

1388676954409 is a deficient number, since it is larger than the sum of its proper divisors (47885412251).

1388676954409 is an equidigital number, since it uses as much as digits as its factorization.

1388676954409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47885412250.

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 1388676954409 in words is "one trillion, three hundred eighty-eight billion, six hundred seventy-six million, nine hundred fifty-four thousand, four hundred nine".