16640072623 has 2 divisors, whose sum is σ = 16640072624. Its totient is φ = 16640072622.

The previous prime is 16640072621. The next prime is 16640072629. The reversal of 16640072623 is 32627004661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16640072623 - 2¹ = 16640072621 is a prime.

Together with 16640072621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16640072621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320036311 + 8320036312.

It is an arithmetic number, because the mean of its divisors is an integer number (8320036312).

Almost surely, 2^16640072623 is an apocalyptic number.

16640072623 is a deficient number, since it is larger than the sum of its proper divisors (1).

16640072623 is an equidigital number, since it uses as much as digits as its factorization.

16640072623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 16640072623 in words is "sixteen billion, six hundred forty million, seventy-two thousand, six hundred twenty-three".