6463977269 has 4 divisors (see below), whose sum is σ = 6844211244. Its totient is φ = 6083743296.

The previous prime is 6463977259. The next prime is 6463977313. The reversal of 6463977269 is 9627793646.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9627793646 = 2 ⋅4813896823.

It can be written as a sum of positive squares in 2 ways, for example, as 3287302225 + 3176675044 = 57335^2 + 56362^2 .

It is a cyclic number.

It is not a de Polignac number, because 6463977269 - 2⁴ = 6463977253 is a prime.

It is a super-2 number, since 2×6463977269² = 83566004268297396722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6463977229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190116962 + ... + 190116995.

It is an arithmetic number, because the mean of its divisors is an integer number (1711052811).

Almost surely, 2^6463977269 is an apocalyptic number.

It is an amenable number.

6463977269 is a deficient number, since it is larger than the sum of its proper divisors (380233975).

6463977269 is a wasteful number, since it uses less digits than its factorization.

6463977269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380233974.

The product of its digits is 20575296, while the sum is 59.

The square root of 6463977269 is about 80398.8636051530. The cubic root of 6463977269 is about 1862.8016195694.

The spelling of 6463977269 in words is "six billion, four hundred sixty-three million, nine hundred seventy-seven thousand, two hundred sixty-nine".