16626540553 has 8 divisors (see below), whose sum is σ = 19005146240. Its totient is φ = 14248781280.

The previous prime is 16626540533. The next prime is 16626540559. The reversal of 16626540553 is 35504562661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16626540553 - 2⁹ = 16626540041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16626540559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168933 + ... + 248578.

It is an arithmetic number, because the mean of its divisors is an integer number (2375643280).

Almost surely, 2^16626540553 is an apocalyptic number.

It is an amenable number.

16626540553 is a deficient number, since it is larger than the sum of its proper divisors (2378605687).

16626540553 is an equidigital number, since it uses as much as digits as its factorization.

16626540553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423207.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 16626540553 in words is "sixteen billion, six hundred twenty-six million, five hundred forty thousand, five hundred fifty-three".