6371381956 has 6 divisors (see below), whose sum is σ = 11149918430. Its totient is φ = 3185690976.

The previous prime is 6371381921. The next prime is 6371381957. The reversal of 6371381956 is 6591831736.

It can be written as a sum of positive squares in only one way, i.e., 6306901056 + 64480900 = 79416^2 + 8030^2 .

It is a super-4 number, since 4×6371381956⁴ (a number of 40 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (6371381957) 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 as a sum of consecutive naturals, namely, 796422741 + ... + 796422748.

Almost surely, 2^6371381956 is an apocalyptic number.

It is an amenable number.

6371381956 is a deficient number, since it is larger than the sum of its proper divisors (4778536474).

6371381956 is a wasteful number, since it uses less digits than its factorization.

6371381956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592845493 (or 1592845491 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 6371381956 is about 79820.9368273763. The cubic root of 6371381956 is about 1853.8640401589.

The spelling of 6371381956 in words is "six billion, three hundred seventy-one million, three hundred eighty-one thousand, nine hundred fifty-six".