6497989986 has 16 divisors (see below), whose sum is σ = 13209029568. Its totient is φ = 2130488400.

The previous prime is 6497989961. The next prime is 6497989999. The reversal of 6497989986 is 6899897946.

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 7 ways as a sum of consecutive naturals, for example, 8876670 + ... + 8877401.

It is an arithmetic number, because the mean of its divisors is an integer number (825564348).

Almost surely, 2^6497989986 is an apocalyptic number.

6497989986 is an abundant number, since it is smaller than the sum of its proper divisors (6711039582).

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

6497989986 is a wasteful number, since it uses less digits than its factorization.

6497989986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17754137.

The product of its digits is 423263232, while the sum is 75.

The square root of 6497989986 is about 80610.1109414942. The cubic root of 6497989986 is about 1866.0631893537.

The spelling of 6497989986 in words is "six billion, four hundred ninety-seven million, nine hundred eighty-nine thousand, nine hundred eighty-six".