649350006020 has 24 divisors (see below), whose sum is σ = 1363947026904. Its totient is φ = 259680571136.

The previous prime is 649350006017. The next prime is 649350006029. The reversal of 649350006020 is 20600053946.

It can be written as a sum of positive squares in 4 ways, for example, as 7531115524 + 641818890496 = 86782^2 + 801136^2 .

It is not an unprimeable number, because it can be changed into a prime (649350006029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3624809 + ... + 3799728.

It is an arithmetic number, because the mean of its divisors is an integer number (56831126121).

Almost surely, 2^649350006020 is an apocalyptic number.

It is an amenable number.

649350006020 is an abundant number, since it is smaller than the sum of its proper divisors (714597020884).

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

649350006020 is a wasteful number, since it uses less digits than its factorization.

649350006020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428919 (or 7428917 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 649350006020 its reverse (20600053946), we get a palindrome (669950059966).

The spelling of 649350006020 in words is "six hundred forty-nine billion, three hundred fifty million, six thousand, twenty".