3551782781441 has 8 divisors (see below), whose sum is σ = 3666576850944. Its totient is φ = 3437002488960.

The previous prime is 3551782781369. The next prime is 3551782781507. The reversal of 3551782781441 is 1441872871553.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3551782781441 - 2²⁶ = 3551715672577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3551782711441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2919041 + ... + 3952766.

It is an arithmetic number, because the mean of its divisors is an integer number (458322106368).

Almost surely, 2^{3551782781441} is an apocalyptic number.

3551782781441 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3551782781441 is a deficient number, since it is larger than the sum of its proper divisors (114794069503).

3551782781441 is a wasteful number, since it uses less digits than its factorization.

3551782781441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6888511.

The product of its digits is 7526400, while the sum is 56.

The spelling of 3551782781441 in words is "three trillion, five hundred fifty-one billion, seven hundred eighty-two million, seven hundred eighty-one thousand, four hundred forty-one".