6381787995 has 48 divisors (see below), whose sum is σ = 12483525600. Its totient is φ = 2987496960.

The previous prime is 6381787991. The next prime is 6381788029. The reversal of 6381787995 is 5997871836.

It is not a de Polignac number, because 6381787995 - 2² = 6381787991 is a prime.

It is a super-2 number, since 2×6381787995² = 81454436026252240050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6381787991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207930 + ... + 236639.

It is an arithmetic number, because the mean of its divisors is an integer number (260073450).

Almost surely, 2^6381787995 is an apocalyptic number.

6381787995 is a deficient number, since it is larger than the sum of its proper divisors (6101737605).

6381787995 is a wasteful number, since it uses less digits than its factorization.

6381787995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444620 (or 444617 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 6381787995 is about 79886.0938774703. The cubic root of 6381787995 is about 1854.8727636784.

The spelling of 6381787995 in words is "six billion, three hundred eighty-one million, seven hundred eighty-seven thousand, nine hundred ninety-five".