16251233643 has 24 divisors (see below), whose sum is σ = 24348701520. Its totient is φ = 10432457280.

The previous prime is 16251233641. The next prime is 16251233699. The reversal of 16251233643 is 34633215261.

16251233643 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 1 + 2 + 3 + 3 + 643 = 666.

16251233643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16251233643 - 2¹ = 16251233641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16251233598 and 16251233607.

It is not an unprimeable number, because it can be changed into a prime (16251233641) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 13888 + ... + 180818.

It is an arithmetic number, because the mean of its divisors is an integer number (1014529230).

Almost surely, 2^16251233643 is an apocalyptic number.

16251233643 is a deficient number, since it is larger than the sum of its proper divisors (8097467877).

16251233643 is a wasteful number, since it uses less digits than its factorization.

16251233643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167339 (or 167336 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The spelling of 16251233643 in words is "sixteen billion, two hundred fifty-one million, two hundred thirty-three thousand, six hundred forty-three".