2051649456 has 20 divisors (see below), whose sum is σ = 5300094552. Its totient is φ = 683883136.

The previous prime is 2051649377. The next prime is 2051649493. The reversal of 2051649456 is 6549461502.

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 3 ways as a sum of consecutive naturals, for example, 21371301 + ... + 21371396.

Almost surely, 2^2051649456 is an apocalyptic number.

It is an amenable number.

2051649456 is an abundant number, since it is smaller than the sum of its proper divisors (3248445096).

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

2051649456 is a wasteful number, since it uses less digits than its factorization.

2051649456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42742708 (or 42742702 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 2051649456 is about 45295.1372224436. The cubic root of 2051649456 is about 1270.6747104079.

The spelling of 2051649456 in words is "two billion, fifty-one million, six hundred forty-nine thousand, four hundred fifty-six".