6140663881 has 16 divisors (see below), whose sum is σ = 6953626368. Its totient is φ = 5374051200.

The previous prime is 6140663873. The next prime is 6140663909. The reversal of 6140663881 is 1883660416.

It is a happy number.

It is not a de Polignac number, because 6140663881 - 2³ = 6140663873 is a prime.

It is a super-2 number, since 2×6140663881² = 75415505798835964322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6140663831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65820 + ... + 128893.

It is an arithmetic number, because the mean of its divisors is an integer number (434601648).

Almost surely, 2^6140663881 is an apocalyptic number.

6140663881 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6140663881 is a deficient number, since it is larger than the sum of its proper divisors (812962487).

6140663881 is a wasteful number, since it uses less digits than its factorization.

6140663881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194832.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 6140663881 is about 78362.3881782581. The cubic root of 6140663881 is about 1831.2112260759.

The spelling of 6140663881 in words is "six billion, one hundred forty million, six hundred sixty-three thousand, eight hundred eighty-one".