16003955647 has 2 divisors, whose sum is σ = 16003955648. Its totient is φ = 16003955646.

The previous prime is 16003955633. The next prime is 16003955663. The reversal of 16003955647 is 74655930061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16003955647 - 2²³ = 15995567039 is a prime.

It is a super-2 number, since 2×16003955647² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16003955597 and 16003955606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16003955447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8001977823 + 8001977824.

It is an arithmetic number, because the mean of its divisors is an integer number (8001977824).

Almost surely, 2^16003955647 is an apocalyptic number.

16003955647 is a deficient number, since it is larger than the sum of its proper divisors (1).

16003955647 is an equidigital number, since it uses as much as digits as its factorization.

16003955647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 16003955647 in words is "sixteen billion, three million, nine hundred fifty-five thousand, six hundred forty-seven".