16244968640 has 56 divisors (see below), whose sum is σ = 38703016320. Its totient is φ = 6494681088.

The previous prime is 16244968637. The next prime is 16244968643. The reversal of 16244968640 is 4686944261.

It is an interprime number because it is at equal distance from previous prime (16244968637) and next prime (16244968643).

It is a super-2 number, since 2×16244968640² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16244968643) 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 7 ways as a sum of consecutive naturals, for example, 673916 + ... + 697604.

Almost surely, 2^16244968640 is an apocalyptic number.

16244968640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16244968640 is an abundant number, since it is smaller than the sum of its proper divisors (22458047680).

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

16244968640 is a wasteful number, since it uses less digits than its factorization.

16244968640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25849 (or 25839 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 16244968640 in words is "sixteen billion, two hundred forty-four million, nine hundred sixty-eight thousand, six hundred forty".