649255685615712 has 336 divisors, whose sum is σ = 2190362472012960. Its totient is φ = 185490913130496.

The previous prime is 649255685615623. The next prime is 649255685615723. The reversal of 649255685615712 is 217516586552946.

649255685615712 is a `hidden beast` number, since 6 + 4 + 9 + 2 + 5 + 5 + 6 + 8 + 561 + 57 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (72).

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 55 ways as a sum of consecutive naturals, for example, 3081126868 + ... + 3081337580.

It is an arithmetic number, because the mean of its divisors is an integer number (6518935928610).

Almost surely, 2^{649255685615712} 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 649255685615712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095181236006480).

649255685615712 is an abundant number, since it is smaller than the sum of its proper divisors (1541106786397248).

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

649255685615712 is a wasteful number, since it uses less digits than its factorization.

649255685615712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229617 (or 229594 counting only the distinct ones).

The product of its digits is 1088640000, while the sum is 72.

The spelling of 649255685615712 in words is "six hundred forty-nine trillion, two hundred fifty-five billion, six hundred eighty-five million, six hundred fifteen thousand, seven hundred twelve".