6550811553 has 32 divisors (see below), whose sum is σ = 10275793920. Its totient is φ = 3659653440.

The previous prime is 6550811551. The next prime is 6550811563. The reversal of 6550811553 is 3551180556.

It is not a de Polignac number, because 6550811553 - 2¹ = 6550811551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (6550811551) 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 31 ways as a sum of consecutive naturals, for example, 306700 + ... + 327362.

It is an arithmetic number, because the mean of its divisors is an integer number (321118560).

Almost surely, 2^6550811553 is an apocalyptic number.

It is an amenable number.

6550811553 is a deficient number, since it is larger than the sum of its proper divisors (3724982367).

6550811553 is a wasteful number, since it uses less digits than its factorization.

6550811553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21429.

The product of its (nonzero) digits is 90000, while the sum is 39.

The square root of 6550811553 is about 80937.0839170772. The cubic root of 6550811553 is about 1871.1059024187.

The spelling of 6550811553 in words is "six billion, five hundred fifty million, eight hundred eleven thousand, five hundred fifty-three".