6397784871 has 8 divisors (see below), whose sum is σ = 8532739824. Its totient is φ = 4264009920.

The previous prime is 6397784837. The next prime is 6397784873. The reversal of 6397784871 is 1784877936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6397784871 - 2¹⁸ = 6397522727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397784873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282270 + ... + 304091.

It is an arithmetic number, because the mean of its divisors is an integer number (1066592478).

Almost surely, 2^6397784871 is an apocalyptic number.

6397784871 is a deficient number, since it is larger than the sum of its proper divisors (2134954953).

6397784871 is a wasteful number, since it uses less digits than its factorization.

6397784871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590001.

The product of its digits is 14224896, while the sum is 60.

The square root of 6397784871 is about 79986.1542455943. The cubic root of 6397784871 is about 1856.4213062686.

The spelling of 6397784871 in words is "six billion, three hundred ninety-seven million, seven hundred eighty-four thousand, eight hundred seventy-one".