16256454643 has 16 divisors (see below), whose sum is σ = 19614674016. Its totient is φ = 13273079040.

The previous prime is 16256454631. The next prime is 16256454707. The reversal of 16256454643 is 34645465261.

It is not a de Polignac number, because 16256454643 - 2²⁹ = 15719583731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16256454593 and 16256454602.

It is not an unprimeable number, because it can be changed into a prime (16256454443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530946 + ... + 1541527.

It is an arithmetic number, because the mean of its divisors is an integer number (1225917126).

Almost surely, 2^16256454643 is an apocalyptic number.

16256454643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16256454643 is a deficient number, since it is larger than the sum of its proper divisors (3358219373).

16256454643 is a wasteful number, since it uses less digits than its factorization.

16256454643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072534.

The product of its digits is 2073600, while the sum is 46.

The spelling of 16256454643 in words is "sixteen billion, two hundred fifty-six million, four hundred fifty-four thousand, six hundred forty-three".