649506485 has 8 divisors (see below), whose sum is σ = 786305880. Its totient is φ = 515006464.

The previous prime is 649506449. The next prime is 649506497. The reversal of 649506485 is 584605946.

It can be written as a sum of positive squares in 4 ways, for example, as 42081169 + 607425316 = 6487^2 + 24646^2 .

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 649506485 - 2⁶ = 649506421 is a prime.

It is a congruent 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, 574220 + ... + 575349.

It is an arithmetic number, because the mean of its divisors is an integer number (98288235).

Almost surely, 2^649506485 is an apocalyptic number.

It is an amenable number.

649506485 is a deficient number, since it is larger than the sum of its proper divisors (136799395).

649506485 is a wasteful number, since it uses less digits than its factorization.

649506485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149687.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The square root of 649506485 is about 25485.4171046895. The cubic root of 649506485 is about 866.0198180425.

The spelling of 649506485 in words is "six hundred forty-nine million, five hundred six thousand, four hundred eighty-five".