1639926016 has 27 divisors (see below), whose sum is σ = 3274739923. Its totient is φ = 819639040.

The previous prime is 1639925999. The next prime is 1639926019. The reversal of 1639926016 is 6106299361.

The square root of 1639926016 is 40496.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1639926019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 646671 + ... + 649201.

Almost surely, 2^1639926016 is an apocalyptic number.

1639926016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1639926016 is the 40496-th square number.

It is an amenable number.

1639926016 is a deficient number, since it is larger than the sum of its proper divisors (1634813907).

1639926016 is an frugal number, since it uses more digits than its factorization.

1639926016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078 (or 2533 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The cubic root of 1639926016 is about 1179.2559745189.

Multiplying 1639926016 by its product of nonzero digits (104976), we get a square (172152873455616 = 13120704²).

The spelling of 1639926016 in words is "one billion, six hundred thirty-nine million, nine hundred twenty-six thousand, sixteen".