649745012065 has 8 divisors (see below), whose sum is σ = 784362841920. Its totient is φ = 516683458032.

The previous prime is 649745012053. The next prime is 649745012069. The reversal of 649745012065 is 560210547946.

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

It is a cyclic number.

It is not a de Polignac number, because 649745012065 - 2²³ = 649736623457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649745012069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389068035 + ... + 389069704.

It is an arithmetic number, because the mean of its divisors is an integer number (98045355240).

Almost surely, 2^649745012065 is an apocalyptic number.

It is an amenable number.

649745012065 is a deficient number, since it is larger than the sum of its proper divisors (134617829855).

649745012065 is a wasteful number, since it uses less digits than its factorization.

649745012065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778137911.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 649745012065 in words is "six hundred forty-nine billion, seven hundred forty-five million, twelve thousand, sixty-five".