650381645 has 8 divisors (see below), whose sum is σ = 781777656. Its totient is φ = 519425536.

The previous prime is 650381617. The next prime is 650381653. The reversal of 650381645 is 546183056.

It can be written as a sum of positive squares in 4 ways, for example, as 118940836 + 531440809 = 10906^2 + 23053^2 .

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 650381645 - 2¹² = 650377549 is a prime.

It is a super-3 number, since 3×650381645³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 650381599 and 650381608.

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, 106712 + ... + 112641.

It is an arithmetic number, because the mean of its divisors is an integer number (97722207).

Almost surely, 2^650381645 is an apocalyptic number.

It is an amenable number.

650381645 is a deficient number, since it is larger than the sum of its proper divisors (131396011).

650381645 is a wasteful number, since it uses less digits than its factorization.

650381645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219951.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 650381645 is about 25502.5811438764. The cubic root of 650381645 is about 866.4086084905.

The spelling of 650381645 in words is "six hundred fifty million, three hundred eighty-one thousand, six hundred forty-five".