6459918639769 has 27 divisors (see below), whose sum is σ = 7558124538783. Its totient is φ = 5505185742000.

The previous prime is 6459918639761. The next prime is 6459918639809. The reversal of 6459918639769 is 9679368199546.

The square root of 6459918639769 is 2541637.

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., 538775084169 + 5921143555600 = 734013^2 + 2433340^2 .

It is not a de Polignac number, because 6459918639769 - 2³ = 6459918639761 is a prime.

It is a super-2 number, since 2×6459918639769² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6459918639692 and 6459918639701.

It is not an unprimeable number, because it can be changed into a prime (6459918639761) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 3398167719 + ... + 3398169619.

Almost surely, 2^{6459918639769} is an apocalyptic number.

6459918639769 is the 2541637-th square number.

6459918639769 is the 1270819-th centered octagonal number.

It is an amenable number.

6459918639769 is a deficient number, since it is larger than the sum of its proper divisors (1098205899014).

6459918639769 is an frugal number, since it uses more digits than its factorization.

6459918639769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198 (or 2099 counting only the distinct ones).

The product of its digits is 4761711360, while the sum is 82.

The spelling of 6459918639769 in words is "six trillion, four hundred fifty-nine billion, nine hundred eighteen million, six hundred thirty-nine thousand, seven hundred sixty-nine".