649297967232 has 128 divisors (see below), whose sum is σ = 1749765870720. Its totient is φ = 213289574400.

The previous prime is 649297967221. The next prime is 649297967239. The reversal of 649297967232 is 232769792946.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (649297967239) 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 15 ways as a sum of consecutive naturals, for example, 88686132 + ... + 88693452.

It is an arithmetic number, because the mean of its divisors is an integer number (13670045865).

Almost surely, 2^649297967232 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 649297967232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874882935360).

649297967232 is an abundant number, since it is smaller than the sum of its proper divisors (1100467903488).

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

649297967232 is a wasteful number, since it uses less digits than its factorization.

649297967232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10662 (or 10650 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 66.

The spelling of 649297967232 in words is "six hundred forty-nine billion, two hundred ninety-seven million, nine hundred sixty-seven thousand, two hundred thirty-two".