6371395640 has 16 divisors (see below), whose sum is σ = 14335640280. Its totient is φ = 2548558240.

The previous prime is 6371395633. The next prime is 6371395651. The reversal of 6371395640 is 465931736.

It is a happy number.

It is a super-2 number, since 2×6371395640² = 81189364802822019200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6371395591 and 6371395600.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79642406 + ... + 79642485.

Almost surely, 2^6371395640 is an apocalyptic number.

It is an amenable number.

6371395640 is an abundant number, since it is smaller than the sum of its proper divisors (7964244640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6371395640 is a wasteful number, since it uses less digits than its factorization.

6371395640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159284902 (or 159284898 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 6371395640 is about 79821.0225441894. The cubic root of 6371395640 is about 1853.8653673570.

The spelling of 6371395640 in words is "six billion, three hundred seventy-one million, three hundred ninety-five thousand, six hundred forty".