649653441528 has 64 divisors (see below), whose sum is σ = 1998933672960. Its totient is φ = 171337170816.

The previous prime is 649653441517. The next prime is 649653441533. The reversal of 649653441528 is 825144356946.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148728000 + ... + 148732367.

It is an arithmetic number, because the mean of its divisors is an integer number (31233338640).

Almost surely, 2^649653441528 is an apocalyptic number.

It is an amenable number.

649653441528 is an abundant number, since it is smaller than the sum of its proper divisors (1349280231432).

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

649653441528 is a wasteful number, since it uses less digits than its factorization.

649653441528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297460396 (or 297460392 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 57.

The spelling of 649653441528 in words is "six hundred forty-nine billion, six hundred fifty-three million, four hundred forty-one thousand, five hundred twenty-eight".