649193728512 has 160 divisors (see below), whose sum is σ = 1977135633792. Its totient is φ = 185430196224.

The previous prime is 649193728501. The next prime is 649193728523. The reversal of 649193728512 is 215827391946.

It is an interprime number because it is at equal distance from previous prime (649193728501) and next prime (649193728523).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50882838 + ... + 50895594.

Almost surely, 2^649193728512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649193728512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (988567816896).

649193728512 is an abundant number, since it is smaller than the sum of its proper divisors (1327941905280).

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

649193728512 is a wasteful number, since it uses less digits than its factorization.

649193728512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17518 (or 17502 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 649193728512 in words is "six hundred forty-nine billion, one hundred ninety-three million, seven hundred twenty-eight thousand, five hundred twelve".