6416737821 has 24 divisors (see below), whose sum is σ = 9988524000. Its totient is φ = 3946019616.

The previous prime is 6416737799. The next prime is 6416737837. The reversal of 6416737821 is 1287376146.

It is not a de Polignac number, because 6416737821 - 2²⁷ = 6282520093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6416737121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157090 + ... + 193676.

It is an arithmetic number, because the mean of its divisors is an integer number (416188500).

Almost surely, 2^6416737821 is an apocalyptic number.

It is an amenable number.

6416737821 is a deficient number, since it is larger than the sum of its proper divisors (3571786179).

6416737821 is a wasteful number, since it uses less digits than its factorization.

6416737821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38105 (or 38102 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 6416737821 is about 80104.5430734113. The cubic root of 6416737821 is about 1858.2526679047.

The spelling of 6416737821 in words is "six billion, four hundred sixteen million, seven hundred thirty-seven thousand, eight hundred twenty-one".