6436486668 has 12 divisors (see below), whose sum is σ = 15018468920. Its totient is φ = 2145495552.

The previous prime is 6436486613. The next prime is 6436486673. The reversal of 6436486668 is 8666846346.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268186933 + ... + 268186956.

Almost surely, 2^6436486668 is an apocalyptic number.

It is an amenable number.

6436486668 is an abundant number, since it is smaller than the sum of its proper divisors (8581982252).

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

6436486668 is a wasteful number, since it uses less digits than its factorization.

6436486668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536373896 (or 536373894 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 57.

The square root of 6436486668 is about 80227.7175794002. The cubic root of 6436486668 is about 1860.1571020037.

The spelling of 6436486668 in words is "six billion, four hundred thirty-six million, four hundred eighty-six thousand, six hundred sixty-eight".