649533447550 has 48 divisors (see below), whose sum is σ = 1301438733840. Its totient is φ = 239758928640.

The previous prime is 649533447413. The next prime is 649533447553. The reversal of 649533447550 is 55744335946.

It is a junction number, because it is equal to n+sod(n) for n = 649533447491 and 649533447500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649533447553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2152269 + ... + 2435431.

It is an arithmetic number, because the mean of its divisors is an integer number (27113306955).

Almost surely, 2^649533447550 is an apocalyptic number.

649533447550 is an abundant number, since it is smaller than the sum of its proper divisors (651905286290).

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

649533447550 is a wasteful number, since it uses less digits than its factorization.

649533447550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286717 (or 286712 counting only the distinct ones).

The product of its (nonzero) digits is 27216000, while the sum is 55.

The spelling of 649533447550 in words is "six hundred forty-nine billion, five hundred thirty-three million, four hundred forty-seven thousand, five hundred fifty".