2641268138 has 48 divisors (see below), whose sum is σ = 4365903240. Its totient is φ = 1194209280.

The previous prime is 2641268101. The next prime is 2641268141. The reversal of 2641268138 is 8318621462.

It can be written as a sum of positive squares in 4 ways, for example, as 2638568689 + 2699449 = 51367^2 + 1643^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2641268095 and 2641268104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7482170 + ... + 7482522.

Almost surely, 2^2641268138 is an apocalyptic number.

2641268138 is a deficient number, since it is larger than the sum of its proper divisors (1724635102).

2641268138 is a wasteful number, since it uses less digits than its factorization.

2641268138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 632 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 2641268138 is about 51393.2693842297. The cubic root of 2641268138 is about 1382.3059078076.

The spelling of 2641268138 in words is "two billion, six hundred forty-one million, two hundred sixty-eight thousand, one hundred thirty-eight".