2649855450 has 144 divisors (see below), whose sum is σ = 7616949984. Its totient is φ = 604492800.

The previous prime is 2649855431. The next prime is 2649855517. The reversal of 2649855450 is 545589462.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2649855450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 474072 + ... + 479628.

It is an arithmetic number, because the mean of its divisors is an integer number (52895486).

Almost surely, 2^2649855450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2649855450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3808474992).

2649855450 is an abundant number, since it is smaller than the sum of its proper divisors (4967094534).

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

2649855450 is a wasteful number, since it uses less digits than its factorization.

2649855450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617 (or 5595 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The square root of 2649855450 is about 51476.7466920745. The cubic root of 2649855450 is about 1383.8023418957.

The spelling of 2649855450 in words is "two billion, six hundred forty-nine million, eight hundred fifty-five thousand, four hundred fifty".