6550040736 has 144 divisors (see below), whose sum is σ = 19186713000. Its totient is φ = 2119606272.

The previous prime is 6550040681. The next prime is 6550040797. The reversal of 6550040736 is 6370400556.

It can be written as a sum of positive squares in 4 ways, for example, as 6535752336 + 14288400 = 80844^2 + 3780^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6550040736.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14587840 + ... + 14588288.

Almost surely, 2^6550040736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6550040736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9593356500).

6550040736 is an abundant number, since it is smaller than the sum of its proper divisors (12636672264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6550040736 is an equidigital number, since it uses as much as digits as its factorization.

6550040736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 6550040736 is about 80932.3219486504. The cubic root of 6550040736 is about 1871.0325101477.

The spelling of 6550040736 in words is "six billion, five hundred fifty million, forty thousand, seven hundred thirty-six".