6553661145421 has 8 divisors (see below), whose sum is σ = 7078128380064. Its totient is φ = 6032099547120.

The previous prime is 6553661145419. The next prime is 6553661145439. The reversal of 6553661145421 is 1245411663556.

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 6553661145421 - 2¹ = 6553661145419 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 (6553661145821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726404395 + ... + 726413416.

It is an arithmetic number, because the mean of its divisors is an integer number (884766047508).

Almost surely, 2^{6553661145421} is an apocalyptic number.

It is an amenable number.

6553661145421 is a deficient number, since it is larger than the sum of its proper divisors (524467234643).

6553661145421 is a wasteful number, since it uses less digits than its factorization.

6553661145421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452818171.

The product of its digits is 2592000, while the sum is 49.

The spelling of 6553661145421 in words is "six trillion, five hundred fifty-three billion, six hundred sixty-one million, one hundred forty-five thousand, four hundred twenty-one".