6493875381 has 144 divisors (see below), whose sum is σ = 11889765888. Its totient is φ = 3527193600.

The previous prime is 6493875359. The next prime is 6493875413. The reversal of 6493875381 is 1835783946.

6493875381 is a `hidden beast` number, since 6 + 493 + 8 + 75 + 3 + 81 = 666.

It is not a de Polignac number, because 6493875381 - 2⁹ = 6493874869 is a prime.

It is a super-2 number, since 2×6493875381² = 84340834927915790322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6493875301) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 26945421 + ... + 26945661.

Almost surely, 2^6493875381 is an apocalyptic number.

It is an amenable number.

6493875381 is a deficient number, since it is larger than the sum of its proper divisors (5395890507).

6493875381 is a wasteful number, since it uses less digits than its factorization.

6493875381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 355 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 6493875381 is about 80584.5852567351. The cubic root of 6493875381 is about 1865.6692350109.

The spelling of 6493875381 in words is "six billion, four hundred ninety-three million, eight hundred seventy-five thousand, three hundred eighty-one".