649996069573 has 4 divisors (see below), whose sum is σ = 650129352300. Its totient is φ = 649862786848.

The previous prime is 649996069517. The next prime is 649996069577. The reversal of 649996069573 is 375960699946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164642800644 + 485353268929 = 405762^2 + 696673^2 .

It is a cyclic number.

It is not a de Polignac number, because 649996069573 - 2²¹ = 649993972421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649996069496 and 649996069505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649996069577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66634048 + ... + 66643801.

It is an arithmetic number, because the mean of its divisors is an integer number (162532338075).

Almost surely, 2^649996069573 is an apocalyptic number.

It is an amenable number.

649996069573 is a deficient number, since it is larger than the sum of its proper divisors (133282727).

649996069573 is a wasteful number, since it uses less digits than its factorization.

649996069573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133282726.

The product of its (nonzero) digits is 595213920, while the sum is 73.

The spelling of 649996069573 in words is "six hundred forty-nine billion, nine hundred ninety-six million, sixty-nine thousand, five hundred seventy-three".