55500004869421 has 8 divisors (see below), whose sum is σ = 63472290704064. Its totient is φ = 47538647462400.

The previous prime is 55500004869401. The next prime is 55500004869427. The reversal of 55500004869421 is 12496840000555.

It is a happy number.

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 55500004869421 - 2⁹ = 55500004868909 is a prime.

It is a super-2 number, since 2×55500004869421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500004869427) 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, 2732096020 + ... + 2732116333.

It is an arithmetic number, because the mean of its divisors is an integer number (7934036338008).

Almost surely, 2^{55500004869421} is an apocalyptic number.

It is an amenable number.

55500004869421 is a deficient number, since it is larger than the sum of its proper divisors (7972285834643).

55500004869421 is a wasteful number, since it uses less digits than its factorization.

55500004869421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464213811.

The product of its (nonzero) digits is 1728000, while the sum is 49.

Adding to 55500004869421 its reverse (12496840000555), we get a palindrome (67996844869976).

The spelling of 55500004869421 in words is "fifty-five trillion, five hundred billion, four million, eight hundred sixty-nine thousand, four hundred twenty-one".