649787676065 has 8 divisors (see below), whose sum is σ = 850631139648. Its totient is φ = 472572855280.

The previous prime is 649787676053. The next prime is 649787676067. The reversal of 649787676065 is 560676787946.

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

It is not a de Polignac number, because 649787676065 - 2⁸ = 649787675809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649787676065.

It is not an unprimeable number, because it can be changed into a prime (649787676067) 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, 5907160637 + ... + 5907160746.

It is an arithmetic number, because the mean of its divisors is an integer number (106328892456).

Almost surely, 2^649787676065 is an apocalyptic number.

It is an amenable number.

649787676065 is a deficient number, since it is larger than the sum of its proper divisors (200843463583).

649787676065 is a wasteful number, since it uses less digits than its factorization.

649787676065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11814321399.

The product of its (nonzero) digits is 640120320, while the sum is 71.

The spelling of 649787676065 in words is "six hundred forty-nine billion, seven hundred eighty-seven million, six hundred seventy-six thousand, sixty-five".