55421671699 has 4 divisors (see below), whose sum is σ = 55423916464. Its totient is φ = 55419426936.

The previous prime is 55421671693. The next prime is 55421671727. The reversal of 55421671699 is 99617612455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99617612455 = 5 ⋅19923522491.

It is a cyclic number.

It is not a de Polignac number, because 55421671699 - 2⁵ = 55421671667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55421671693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084932 + ... + 1134865.

It is an arithmetic number, because the mean of its divisors is an integer number (13855979116).

Almost surely, 2^55421671699 is an apocalyptic number.

55421671699 is a deficient number, since it is larger than the sum of its proper divisors (2244765).

55421671699 is a wasteful number, since it uses less digits than its factorization.

55421671699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244764.

The product of its digits is 4082400, while the sum is 55.

The spelling of 55421671699 in words is "fifty-five billion, four hundred twenty-one million, six hundred seventy-one thousand, six hundred ninety-nine".