55204045060621 has 4 divisors (see below), whose sum is σ = 55465675606144. Its totient is φ = 54942414515100.

The previous prime is 55204045060609. The next prime is 55204045060657. The reversal of 55204045060621 is 12606054040255.

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 55204045060621 - 2¹⁷ = 55204044929549 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 (55204045060121) 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, 130815272445 + ... + 130815272866.

It is an arithmetic number, because the mean of its divisors is an integer number (13866418901536).

Almost surely, 2^{55204045060621} is an apocalyptic number.

It is an amenable number.

55204045060621 is a deficient number, since it is larger than the sum of its proper divisors (261630545523).

55204045060621 is a wasteful number, since it uses less digits than its factorization.

55204045060621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261630545522.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 55204045060621 in words is "fifty-five trillion, two hundred four billion, forty-five million, sixty thousand, six hundred twenty-one".