650055681 has 18 divisors (see below), whose sum is σ = 1032091970. Its totient is φ = 393972480.

The previous prime is 650055671. The next prime is 650055689. The reversal of 650055681 is 186550056.

It can be written as a sum of positive squares in only one way, i.e., 533610000 + 116445681 = 23100^2 + 10791^2 .

It is not a de Polignac number, because 650055681 - 2⁵ = 650055649 is a prime.

It is a super-2 number, since 2×650055681² = 845144776800747522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650055689) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 297376 + ... + 299553.

Almost surely, 2^650055681 is an apocalyptic number.

It is an amenable number.

650055681 is a deficient number, since it is larger than the sum of its proper divisors (382036289).

650055681 is a wasteful number, since it uses less digits than its factorization.

650055681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596957 (or 596943 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 650055681 is about 25496.1895388311. The cubic root of 650055681 is about 866.2638395370.

The spelling of 650055681 in words is "six hundred fifty million, fifty-five thousand, six hundred eighty-one".