649508658241 has 9 divisors (see below), whose sum is σ = 658843555489. Its totient is φ = 640304234500.

The previous prime is 649508658229. The next prime is 649508658247. The reversal of 649508658241 is 142856805946.

It is a happy number.

The square root of 649508658241 is 805921.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 649508658241 - 2²¹ = 649506561089 is a prime.

It is a super-2 number, since 2×649508658241² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649508658247) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57214716 + ... + 57226066.

Almost surely, 2^649508658241 is an apocalyptic number.

649508658241 is the 805921-st square number.

649508658241 is the 402961-st centered octagonal number.

It is an amenable number.

649508658241 is a deficient number, since it is larger than the sum of its proper divisors (9334897248).

649508658241 is an frugal number, since it uses more digits than its factorization.

649508658241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22844 (or 11422 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 58.

The spelling of 649508658241 in words is "six hundred forty-nine billion, five hundred eight million, six hundred fifty-eight thousand, two hundred forty-one".