6404051550 has 96 divisors (see below), whose sum is σ = 17280581472. Its totient is φ = 1560084480.

The previous prime is 6404051519. The next prime is 6404051561. The reversal of 6404051550 is 551504046.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 172222 + ... + 206078.

It is an arithmetic number, because the mean of its divisors is an integer number (180006057).

Almost surely, 2^6404051550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6404051550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8640290736).

6404051550 is an abundant number, since it is smaller than the sum of its proper divisors (10876529922).

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

6404051550 is a wasteful number, since it uses less digits than its factorization.

6404051550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33982 (or 33977 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 6404051550 is about 80025.3181811856. The cubic root of 6404051550 is about 1857.0272347431.

Adding to 6404051550 its reverse (551504046), we get a palindrome (6955555596).

The spelling of 6404051550 in words is "six billion, four hundred four million, fifty-one thousand, five hundred fifty".