6481791 has 24 divisors (see below), whose sum is σ = 9880416. Its totient is φ = 4086720.

The previous prime is 6481789. The next prime is 6481807. The reversal of 6481791 is 1971846.

6481791 is a `hidden beast` number, since 648 + 1 + 7 + 9 + 1 = 666.

It is not a de Polignac number, because 6481791 - 2¹ = 6481789 is a prime.

It is a super-2 number, since 2×6481791² = 84027229135362, which contains 22 as substring.

6481791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6481711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35721 + ... + 35901.

It is an arithmetic number, because the mean of its divisors is an integer number (411684).

Almost surely, 2^6481791 is an apocalyptic number.

6481791 is a deficient number, since it is larger than the sum of its proper divisors (3398625).

6481791 is a wasteful number, since it uses less digits than its factorization.

6481791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 380 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 6481791 is about 2545.9361735912. The cubic root of 6481791 is about 186.4511248658.

The spelling of 6481791 in words is "six million, four hundred eighty-one thousand, seven hundred ninety-one".