649241646 has 16 divisors (see below), whose sum is σ = 1300409424. Its totient is φ = 216092864.

The previous prime is 649241641. The next prime is 649241693. The reversal of 649241646 is 646142946.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 649241598 and 649241607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649241641) 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, 75855 + ... + 83978.

It is an arithmetic number, because the mean of its divisors is an integer number (81275589).

Almost surely, 2^649241646 is an apocalyptic number.

649241646 is an abundant number, since it is smaller than the sum of its proper divisors (651167778).

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

649241646 is a wasteful number, since it uses less digits than its factorization.

649241646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160515.

The product of its digits is 248832, while the sum is 42.

The square root of 649241646 is about 25480.2206819329. The cubic root of 649241646 is about 865.9020942996.

The spelling of 649241646 in words is "six hundred forty-nine million, two hundred forty-one thousand, six hundred forty-six".