16720516455 has 16 divisors (see below), whose sum is σ = 26807324544. Its totient is φ = 8899442720.

The previous prime is 16720516429. The next prime is 16720516459. The reversal of 16720516455 is 55461502761.

It is not a de Polignac number, because 16720516455 - 2⁷ = 16720516327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16720516459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1127769 + ... + 1142498.

It is an arithmetic number, because the mean of its divisors is an integer number (1675457784).

Almost surely, 2^16720516455 is an apocalyptic number.

16720516455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16720516455 is a deficient number, since it is larger than the sum of its proper divisors (10086808089).

16720516455 is a wasteful number, since it uses less digits than its factorization.

16720516455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270766.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 16720516455 in words is "sixteen billion, seven hundred twenty million, five hundred sixteen thousand, four hundred fifty-five".