649898612352 has 384 divisors, whose sum is σ = 2111737824000. Its totient is φ = 196620779520.

The previous prime is 649898612309. The next prime is 649898612353. The reversal of 649898612352 is 253216898946.

649898612352 is a `hidden beast` number, since 6 + 4 + 9 + 8 + 9 + 8 + 612 + 3 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a self number, because there is not a number n which added to its sum of digits gives 649898612352.

It is not an unprimeable number, because it can be changed into a prime (649898612353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 461247424 + ... + 461248832.

It is an arithmetic number, because the mean of its divisors is an integer number (5499317250).

Almost surely, 2^649898612352 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 649898612352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055868912000).

649898612352 is an abundant number, since it is smaller than the sum of its proper divisors (1461839211648).

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

649898612352 is a wasteful number, since it uses less digits than its factorization.

649898612352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2528 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 649898612352 in words is "six hundred forty-nine billion, eight hundred ninety-eight million, six hundred twelve thousand, three hundred fifty-two".