55198060643 has 16 divisors (see below), whose sum is σ = 60480263520. Its totient is φ = 49960377600.

The previous prime is 55198060639. The next prime is 55198060651. The reversal of 55198060643 is 34606089155.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55198060643 - 2² = 55198060639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55198060243) 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 15 ways as a sum of consecutive naturals, for example, 2345471 + ... + 2368887.

It is an arithmetic number, because the mean of its divisors is an integer number (3780016470).

Almost surely, 2^55198060643 is an apocalyptic number.

55198060643 is a deficient number, since it is larger than the sum of its proper divisors (5282202877).

55198060643 is a wasteful number, since it uses less digits than its factorization.

55198060643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24358.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 55198060643 in words is "fifty-five billion, one hundred ninety-eight million, sixty thousand, six hundred forty-three".