649039089727260 has 576 divisors, whose sum is σ = 2031642128355840. Its totient is φ = 167665489920000.

The previous prime is 649039089727247. The next prime is 649039089727331. The reversal of 649039089727260 is 62727980930946.

649039089727260 is a `hidden beast` number, since 6 + 4 + 90 + 390 + 8 + 97 + 2 + 7 + 2 + 60 = 666.

It is a super-2 number, since 2×649039089727260² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 103531515406 + ... + 103531521674.

It is an arithmetic number, because the mean of its divisors is an integer number (3527156472840).

Almost surely, 2^{649039089727260} is an apocalyptic number.

649039089727260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649039089727260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015821064177920).

649039089727260 is an abundant number, since it is smaller than the sum of its proper divisors (1382603038628580).

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

649039089727260 is a wasteful number, since it uses less digits than its factorization.

649039089727260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070 (or 7065 counting only the distinct ones).

The product of its (nonzero) digits is 493807104, while the sum is 72.

The spelling of 649039089727260 in words is "six hundred forty-nine trillion, thirty-nine billion, eighty-nine million, seven hundred twenty-seven thousand, two hundred sixty".