6454838781 has 8 divisors (see below), whose sum is σ = 9562724160. Its totient is φ = 4303225836.

The previous prime is 6454838779. The next prime is 6454838807. The reversal of 6454838781 is 1878384546.

6454838781 is a `hidden beast` number, since 6 + 4 + 5 + 483 + 87 + 81 = 666.

It is not a de Polignac number, because 6454838781 - 2¹ = 6454838779 is a prime.

It is a super-2 number, since 2×6454838781² = 83329887377403131922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6454838081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119534025 + ... + 119534078.

It is an arithmetic number, because the mean of its divisors is an integer number (1195340520).

Almost surely, 2^6454838781 is an apocalyptic number.

It is an amenable number.

6454838781 is a deficient number, since it is larger than the sum of its proper divisors (3107885379).

6454838781 is a wasteful number, since it uses less digits than its factorization.

6454838781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239068112 (or 239068106 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 6454838781 is about 80342.0113079079. The cubic root of 6454838781 is about 1861.9233564373.

The spelling of 6454838781 in words is "six billion, four hundred fifty-four million, eight hundred thirty-eight thousand, seven hundred eighty-one".