649956065 has 8 divisors (see below), whose sum is σ = 850851648. Its totient is φ = 472695280.

The previous prime is 649956049. The next prime is 649956113. The reversal of 649956065 is 560659946.

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

It is not a de Polignac number, because 649956065 - 2⁴ = 649956049 is a prime.

It is a Duffinian number.

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, 5908637 + ... + 5908746.

It is an arithmetic number, because the mean of its divisors is an integer number (106356456).

Almost surely, 2^649956065 is an apocalyptic number.

It is an amenable number.

649956065 is a deficient number, since it is larger than the sum of its proper divisors (200895583).

649956065 is a wasteful number, since it uses less digits than its factorization.

649956065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11817399.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The square root of 649956065 is about 25494.2359171637. The cubic root of 649956065 is about 866.2195878678.

The spelling of 649956065 in words is "six hundred forty-nine million, nine hundred fifty-six thousand, sixty-five".