650138749212 has 24 divisors (see below), whose sum is σ = 1606225145616. Its totient is φ = 203965097728.

The previous prime is 650138749181. The next prime is 650138749217. The reversal of 650138749212 is 212947831056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650138749217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1593477123 + ... + 1593477530.

It is an arithmetic number, because the mean of its divisors is an integer number (66926047734).

It is a 1-persistent number, because it is pandigital, but 2⋅650138749212 = 1300277498424 is not.

Almost surely, 2^650138749212 is an apocalyptic number.

It is an amenable number.

650138749212 is an abundant number, since it is smaller than the sum of its proper divisors (956086396404).

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

650138749212 is a wasteful number, since it uses less digits than its factorization.

650138749212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186954677 (or 3186954675 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 650138749212 in words is "six hundred fifty billion, one hundred thirty-eight million, seven hundred forty-nine thousand, two hundred twelve".