16626623505 has 32 divisors (see below), whose sum is σ = 27573125760. Its totient is φ = 8545205760.

The previous prime is 16626623459. The next prime is 16626623513. The reversal of 16626623505 is 50532662661.

It is not a de Polignac number, because 16626623505 - 2¹⁷ = 16626492433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189954 + ... + 263316.

It is an arithmetic number, because the mean of its divisors is an integer number (861660180).

Almost surely, 2^16626623505 is an apocalyptic number.

16626623505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16626623505 is a deficient number, since it is larger than the sum of its proper divisors (10946502255).

16626623505 is a wasteful number, since it uses less digits than its factorization.

16626623505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73921.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 16626623505 in words is "sixteen billion, six hundred twenty-six million, six hundred twenty-three thousand, five hundred five".