55205555021599 has 16 divisors (see below), whose sum is σ = 57643845501600. Its totient is φ = 52802923823104.

The previous prime is 55205555021581. The next prime is 55205555021609. The reversal of 55205555021599 is 99512055550255.

It is a cyclic number.

It is not a de Polignac number, because 55205555021599 - 2⁷ = 55205555021471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55205555021549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289653567 + ... + 289844095.

It is an arithmetic number, because the mean of its divisors is an integer number (3602740343850).

Almost surely, 2^{55205555021599} is an apocalyptic number.

55205555021599 is a deficient number, since it is larger than the sum of its proper divisors (2438290480001).

55205555021599 is a wasteful number, since it uses less digits than its factorization.

55205555021599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284042.

The product of its (nonzero) digits is 25312500, while the sum is 58.

The spelling of 55205555021599 in words is "fifty-five trillion, two hundred five billion, five hundred fifty-five million, twenty-one thousand, five hundred ninety-nine".