650637437641 has 9 divisors (see below), whose sum is σ = 653333771181. Its totient is φ = 647952196332.

The previous prime is 650637437591. The next prime is 650637437669. The reversal of 650637437641 is 146734736056.

The square root of 650637437641 is 806621.

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

It is not a de Polignac number, because 650637437641 - 2³³ = 642047503049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650637437341) 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, 212139790 + ... + 212142856.

Almost surely, 2^650637437641 is an apocalyptic number.

650637437641 is the 806621-st square number.

650637437641 is the 403311-st centered octagonal number.

It is an amenable number.

650637437641 is a deficient number, since it is larger than the sum of its proper divisors (2696333540).

650637437641 is an frugal number, since it uses more digits than its factorization.

650637437641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 650637437641 in words is "six hundred fifty billion, six hundred thirty-seven million, four hundred thirty-seven thousand, six hundred forty-one".