55520006643 has 6 divisors (see below), whose sum is σ = 80195565164. Its totient is φ = 37013337756.

The previous prime is 55520006587. The next prime is 55520006687. The reversal of 55520006643 is 34660002555.

It is a happy number.

55520006643 is a `hidden beast` number, since 5 + 5 + 5 + 2 + 0 + 0 + 0 + 6 + 643 = 666.

It is not a de Polignac number, because 55520006643 - 2¹⁸ = 55519744499 is a prime.

It is a super-2 number, since 2×55520006643² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55520006598 and 55520006607.

It is not an unprimeable number, because it can be changed into a prime (55520006743) 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 5 ways as a sum of consecutive naturals, for example, 3084444805 + ... + 3084444822.

Almost surely, 2^55520006643 is an apocalyptic number.

55520006643 is a deficient number, since it is larger than the sum of its proper divisors (24675558521).

55520006643 is a wasteful number, since it uses less digits than its factorization.

55520006643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6168889633 (or 6168889630 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 55520006643 in words is "fifty-five billion, five hundred twenty million, six thousand, six hundred forty-three".