649091235924 has 36 divisors (see below), whose sum is σ = 1644348724564. Its totient is φ = 215890296192.

The previous prime is 649091235917. The next prime is 649091235929. The reversal of 649091235924 is 429532190946.

649091235924 is a `hidden beast` number, since 6 + 49 + 0 + 9 + 1 + 2 + 3 + 592 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 584509179024 + 64582056900 = 764532^2 + 254130^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649091235929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19710367 + ... + 19743270.

Almost surely, 2^649091235924 is an apocalyptic number.

It is an amenable number.

649091235924 is an abundant number, since it is smaller than the sum of its proper divisors (995257488640).

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

649091235924 is a wasteful number, since it uses less digits than its factorization.

649091235924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39454104 (or 39454099 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 649091235924 in words is "six hundred forty-nine billion, ninety-one million, two hundred thirty-five thousand, nine hundred twenty-four".