6505913985 has 8 divisors (see below), whose sum is σ = 10409462400. Its totient is φ = 3469820784.

The previous prime is 6505913977. The next prime is 6505913993. The reversal of 6505913985 is 5893195056.

It is an interprime number because it is at equal distance from previous prime (6505913977) and next prime (6505913993).

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

It is not a de Polignac number, because 6505913985 - 2³ = 6505913977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216863785 + ... + 216863814.

It is an arithmetic number, because the mean of its divisors is an integer number (1301182800).

Almost surely, 2^6505913985 is an apocalyptic number.

It is an amenable number.

6505913985 is a deficient number, since it is larger than the sum of its proper divisors (3903548415).

6505913985 is a wasteful number, since it uses less digits than its factorization.

6505913985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433727607.

The product of its (nonzero) digits is 1458000, while the sum is 51.

The square root of 6505913985 is about 80659.2461221899. The cubic root of 6505913985 is about 1866.8214072225.

The spelling of 6505913985 in words is "six billion, five hundred five million, nine hundred thirteen thousand, nine hundred eighty-five".