6437216994 has 32 divisors (see below), whose sum is σ = 13888022400. Its totient is φ = 1977361152.

The previous prime is 6437216987. The next prime is 6437216999. The reversal of 6437216994 is 4996127346.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6437216999) 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 15 ways as a sum of consecutive naturals, for example, 22167 + ... + 115610.

It is an arithmetic number, because the mean of its divisors is an integer number (434000700).

Almost surely, 2^6437216994 is an apocalyptic number.

6437216994 is an abundant number, since it is smaller than the sum of its proper divisors (7450805406).

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

6437216994 is a wasteful number, since it uses less digits than its factorization.

6437216994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138394.

The product of its digits is 1959552, while the sum is 51.

The square root of 6437216994 is about 80232.2690318553. The cubic root of 6437216994 is about 1860.2274545519.

The spelling of 6437216994 in words is "six billion, four hundred thirty-seven million, two hundred sixteen thousand, nine hundred ninety-four".