6344400855 has 16 divisors (see below), whose sum is σ = 10931891040. Its totient is φ = 3123397248.

The previous prime is 6344400793. The next prime is 6344400857. The reversal of 6344400855 is 5580044436.

It is not a de Polignac number, because 6344400855 - 2¹¹ = 6344398807 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6344400857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16267500 + ... + 16267889.

It is an arithmetic number, because the mean of its divisors is an integer number (683243190).

Almost surely, 2^6344400855 is an apocalyptic number.

6344400855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6344400855 is a deficient number, since it is larger than the sum of its proper divisors (4587490185).

6344400855 is a wasteful number, since it uses less digits than its factorization.

6344400855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32535410.

The product of its (nonzero) digits is 230400, while the sum is 39.

The square root of 6344400855 is about 79651.7473442987. The cubic root of 6344400855 is about 1851.2434644895.

The spelling of 6344400855 in words is "six billion, three hundred forty-four million, four hundred thousand, eight hundred fifty-five".