649389519744 has 1024 divisors, whose sum is σ = 2233516032000. Its totient is φ = 163034726400.

The previous prime is 649389519743. The next prime is 649389519767. The reversal of 649389519744 is 447915983946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649389519743) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 5957701962 + ... + 5957702070.

It is an arithmetic number, because the mean of its divisors is an integer number (2181168000).

Almost surely, 2^649389519744 is an apocalyptic number.

649389519744 is a gapful number since it is divisible by the number (64) 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 649389519744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116758016000).

649389519744 is an abundant number, since it is smaller than the sum of its proper divisors (1584126512256).

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

649389519744 is a wasteful number, since it uses less digits than its factorization.

649389519744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 295 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 69.

The spelling of 649389519744 in words is "six hundred forty-nine billion, three hundred eighty-nine million, five hundred nineteen thousand, seven hundred forty-four".