650643642 has 48 divisors (see below), whose sum is σ = 1604760768. Its totient is φ = 188591040.

The previous prime is 650643641. The next prime is 650643647. The reversal of 650643642 is 246346056.

650643642 is a `hidden beast` number, since 6 + 5 + 0 + 6 + 4 + 3 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 650643597 and 650643606.

It is not an unprimeable number, because it can be changed into a prime (650643641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66883 + ... + 75990.

It is an arithmetic number, because the mean of its divisors is an integer number (33432516).

Almost surely, 2^650643642 is an apocalyptic number.

650643642 is an abundant number, since it is smaller than the sum of its proper divisors (954117126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

650643642 is a wasteful number, since it uses less digits than its factorization.

650643642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142915 (or 142912 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 650643642 is about 25507.7173028086. The cubic root of 650643642 is about 866.5249330024.

Adding to 650643642 its reverse (246346056), we get a palindrome (896989698).

The spelling of 650643642 in words is "six hundred fifty million, six hundred forty-three thousand, six hundred forty-two".