2065621456 has 20 divisors (see below), whose sum is σ = 4002868800. Its totient is φ = 1032623072.

The previous prime is 2065621429. The next prime is 2065621463. The reversal of 2065621456 is 6541265602.

It is a congruent number.

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, 133785 + ... + 148423.

It is an arithmetic number, because the mean of its divisors is an integer number (200143440).

Almost surely, 2^2065621456 is an apocalyptic number.

It is an amenable number.

2065621456 is a deficient number, since it is larger than the sum of its proper divisors (1937247344).

2065621456 is a wasteful number, since it uses less digits than its factorization.

2065621456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23466 (or 23460 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2065621456 is about 45449.1084180977. The cubic root of 2065621456 is about 1273.5526739156.

The spelling of 2065621456 in words is "two billion, sixty-five million, six hundred twenty-one thousand, four hundred fifty-six".