649040601600 has 960 divisors, whose sum is σ = 2545158528000. Its totient is φ = 161641267200.

The previous prime is 649040601557. The next prime is 649040601619. The reversal of 649040601600 is 6106040946.

649040601600 is a `hidden beast` number, since 6 + 4 + 9 + 0 + 40 + 6 + 0 + 1 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 95 ways as a sum of consecutive naturals, for example, 310693356 + ... + 310695444.

It is an arithmetic number, because the mean of its divisors is an integer number (2651206800).

Almost surely, 2^649040601600 is an apocalyptic number.

649040601600 is a gapful number since it is divisible by the number (60) 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 649040601600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272579264000).

649040601600 is an abundant number, since it is smaller than the sum of its proper divisors (1896117926400).

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

649040601600 is a wasteful number, since it uses less digits than its factorization.

649040601600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186 (or 2159 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 649040601600 in words is "six hundred forty-nine billion, forty million, six hundred one thousand, six hundred".