6381780249 has 64 divisors (see below), whose sum is σ = 9997352960. Its totient is φ = 3585980160.

The previous prime is 6381780247. The next prime is 6381780269. The reversal of 6381780249 is 9420871836.

It is not a de Polignac number, because 6381780249 - 2¹ = 6381780247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6381780198 and 6381780207.

It is not an unprimeable number, because it can be changed into a prime (6381780247) 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 63 ways as a sum of consecutive naturals, for example, 8429979 + ... + 8430735.

It is an arithmetic number, because the mean of its divisors is an integer number (156208640).

Almost surely, 2^6381780249 is an apocalyptic number.

It is an amenable number.

6381780249 is a deficient number, since it is larger than the sum of its proper divisors (3615572711).

6381780249 is a wasteful number, since it uses less digits than its factorization.

6381780249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 6381780249 is about 79886.0453959263. The cubic root of 6381780249 is about 1854.8720132174.

The spelling of 6381780249 in words is "six billion, three hundred eighty-one million, seven hundred eighty thousand, two hundred forty-nine".