6544138276 has 12 divisors (see below), whose sum is σ = 12333183772. Its totient is φ = 3020371488.

The previous prime is 6544138241. The next prime is 6544138291. The reversal of 6544138276 is 6728314456.

It can be written as a sum of positive squares in 2 ways, for example, as 862596900 + 5681541376 = 29370^2 + 75376^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62924355 + ... + 62924458.

Almost surely, 2^6544138276 is an apocalyptic number.

It is an amenable number.

6544138276 is a deficient number, since it is larger than the sum of its proper divisors (5789045496).

6544138276 is a wasteful number, since it uses less digits than its factorization.

6544138276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125848830 (or 125848828 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 6544138276 is about 80895.8483236315. The cubic root of 6544138276 is about 1870.4703246623.

The spelling of 6544138276 in words is "six billion, five hundred forty-four million, one hundred thirty-eight thousand, two hundred seventy-six".