55621862553 has 32 divisors (see below), whose sum is σ = 75594112000. Its totient is φ = 36374184000.

The previous prime is 55621862479. The next prime is 55621862557. The reversal of 55621862553 is 35526812655.

It is not a de Polignac number, because 55621862553 - 2¹⁷ = 55621731481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55621862557) 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 31 ways as a sum of consecutive naturals, for example, 13728378 + ... + 13732428.

It is an arithmetic number, because the mean of its divisors is an integer number (2362316000).

Almost surely, 2^55621862553 is an apocalyptic number.

It is an amenable number.

55621862553 is a deficient number, since it is larger than the sum of its proper divisors (19972249447).

55621862553 is a wasteful number, since it uses less digits than its factorization.

55621862553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573.

The product of its digits is 2160000, while the sum is 48.

The spelling of 55621862553 in words is "fifty-five billion, six hundred twenty-one million, eight hundred sixty-two thousand, five hundred fifty-three".