6387986361 has 4 divisors (see below), whose sum is σ = 8517315152. Its totient is φ = 4258657572.

The previous prime is 6387986359. The next prime is 6387986411. The reversal of 6387986361 is 1636897836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6387986361 - 2¹ = 6387986359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6387986161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064664391 + ... + 1064664396.

It is an arithmetic number, because the mean of its divisors is an integer number (2129328788).

Almost surely, 2^6387986361 is an apocalyptic number.

It is an amenable number.

6387986361 is a deficient number, since it is larger than the sum of its proper divisors (2129328791).

6387986361 is a wasteful number, since it uses less digits than its factorization.

6387986361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129328790.

The product of its digits is 7838208, while the sum is 57.

The square root of 6387986361 is about 79924.8794869282. The cubic root of 6387986361 is about 1855.4730896918.

The spelling of 6387986361 in words is "six billion, three hundred eighty-seven million, nine hundred eighty-six thousand, three hundred sixty-one".