6555549851 has 4 divisors (see below), whose sum is σ = 6732726912. Its totient is φ = 6378372792.

The previous prime is 6555549799. The next prime is 6555549859. The reversal of 6555549851 is 1589455556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6555549851 is a prime.

It is a super-2 number, since 2×6555549851² = 85950467697892244402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6555549793 and 6555549802.

It is not an unprimeable number, because it can be changed into a prime (6555549859) 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 3 ways as a sum of consecutive naturals, for example, 88588475 + ... + 88588548.

It is an arithmetic number, because the mean of its divisors is an integer number (1683181728).

Almost surely, 2^6555549851 is an apocalyptic number.

6555549851 is a deficient number, since it is larger than the sum of its proper divisors (177177061).

6555549851 is a wasteful number, since it uses less digits than its factorization.

6555549851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177177060.

The product of its digits is 5400000, while the sum is 53.

The square root of 6555549851 is about 80966.3501153411. The cubic root of 6555549851 is about 1871.5569264657.

The spelling of 6555549851 in words is "six billion, five hundred fifty-five million, five hundred forty-nine thousand, eight hundred fifty-one".