649580573 has 8 divisors (see below), whose sum is σ = 654012408. Its totient is φ = 645156864.

The previous prime is 649580563. The next prime is 649580593. The reversal of 649580573 is 375085946.

It can be written as a sum of positive squares in 4 ways, for example, as 42549529 + 607031044 = 6523^2 + 24638^2 .

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 649580573 - 2⁶ = 649580509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649580563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306365 + ... + 308477.

It is an arithmetic number, because the mean of its divisors is an integer number (81751551).

Almost surely, 2^649580573 is an apocalyptic number.

It is an amenable number.

649580573 is a deficient number, since it is larger than the sum of its proper divisors (4431835).

649580573 is a wasteful number, since it uses less digits than its factorization.

649580573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 649580573 is about 25486.8706003699. The cubic root of 649580573 is about 866.0527452153.

The spelling of 649580573 in words is "six hundred forty-nine million, five hundred eighty thousand, five hundred seventy-three".