6439916214601 has 9 divisors (see below), whose sum is σ = 6529530540999. Its totient is φ = 6351515469936.

The previous prime is 6439916214551. The next prime is 6439916214623. The reversal of 6439916214601 is 1064126199346.

The square root of 6439916214601 is 2537699.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3655610161225 + 2784306053376 = 1911965^2 + 1668624^2 .

It is not a de Polignac number, because 6439916214601 - 2¹⁷ = 6439916083529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6439916214631) 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 8 ways as a sum of consecutive naturals, for example, 185234646 + ... + 185269408.

Almost surely, 2^{6439916214601} is an apocalyptic number.

6439916214601 is the 2537699-th square number.

6439916214601 is the 1268850-th centered octagonal number.

It is an amenable number.

6439916214601 is a deficient number, since it is larger than the sum of its proper divisors (89614326398).

6439916214601 is an frugal number, since it uses more digits than its factorization.

6439916214601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69672 (or 34836 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 6439916214601 in words is "six trillion, four hundred thirty-nine billion, nine hundred sixteen million, two hundred fourteen thousand, six hundred one".